BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Nonrelativistic Nambu-Goldstone modes of generalized global symmet
ries and new dynamic critical phenomena in QCD
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1479@conference-indico.kek.jp
DESCRIPTION:Speakers: Noriyuki Sogabe (Keio University)\nWe study the effe
cts of dynamical electromagnetic fields on the second-order chiral phase t
ransition of QCD under a background magnetic field. We show that the inter
action between the photon and the neutral pion through the quantum anomaly
causes the type-B Nambu Goldstone (NG) mode associated with the spontaneo
us breaking of the generalized global symmetries. Furthermore\, we find th
at such a novel NG mode leads to the new dynamic universality class beyond
the conventional Hohenberg and Halperin's classification. We also argue a
possible realization of this new dynamic universality class in 3-dimensio
nal Dirac semimetals.\n\nhttps://conference-indico.kek.jp/event/76/contrib
utions/1479/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1479/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Instability toward the chiral inhomogeneous phase with the functio
nal renormalization
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1480@conference-indico.kek.jp
DESCRIPTION:Speakers: Takeru Yokota (High Energy Accelerator Research Orga
nization)\nIn this talk\, we present our functional-renormalization-group
(FRG) study of the collective excitations around the chiral phase transiti
on line. In particular\, we intensively investigate the sigma-mesonic and
pionic collective modes around the QCD critical point (CP) by calculating
the spectral functions with the FRG. Such an FRG study gives beyond-mean-f
ield pictures of the collective modes since it incorporates the large fluc
tuations involved in the second-order phase transition. We find that one-p
article excitation showing tachyonic instability in the sigma-mesonic chan
nel appears as the quark chemical potential approaches that of the QCD CP
from the hadronic phase with a fixed temperature. Such an unstable mode ha
s finite momentum\, which suggests the instability associated with the tra
nsition to the chiral inhomogeneous phase. We give an explanation for the
origin of this phenomenon: The level repulsion between the one- and two-pa
rticle modes in the sigma-mesonic channel causes the instability in the on
e-particle mode. Since there is no such instability in the pionic channel\
, our result suggests the real kink crystal occurs.\n\nhttps://conference-
indico.kek.jp/event/76/contributions/1480/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1480/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Relativistic quantum molecular dynamics approach for heavy-ion col
lisions at high baryon density region
DTSTART;VALUE=DATE-TIME:20190625T064500Z
DTEND;VALUE=DATE-TIME:20190625T071000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1481@conference-indico.kek.jp
DESCRIPTION:Speakers: Yasushi Nara (Akita International University)\nA new
N-body non-equilibrium transport model based on the relativistic quantum
molecular dynamics (RQMD) is developed for the simulations of high energy
heavy ion collisions at high baryon density regions. In this approach\, ha
drons interact via the sigma-omega fields in the mean-field approximation
as well as the hard two-body scatterings which produce the strings and had
ronic resonances in JAM transport code. We compare results on the beam ene
rgy dependence of the directed and elliptic flows with the E895\,NA49 and
STAR data. The relativistic mean-field theory predicts the density isomer
state which is a strong first-order phase transition to the nucleon matter
to the resonance matter. We investigate the effects of such strong first-
order phase transition to the delta-matter on the directed flow. Our dynam
ical approach can be also applied to the event-by-event fluctuations. We a
lso discuss the effects of delta-matter transition on the net-proton cumul
ant ratios.\n\nhttps://conference-indico.kek.jp/event/76/contributions/148
1/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1481/
END:VEVENT
BEGIN:VEVENT
SUMMARY:String confinement in 2-form lattice gauge theory
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1482@conference-indico.kek.jp
DESCRIPTION:Speakers: Tomoya Hayata (RIKEN)\nWe study the confinement betw
een vortex strings in a 2-form gauge theory by using the lattice Monte Car
lo simulation. We calculate the string-antistring potential from the surfa
ce operator of the 2-form gauge field in the abelian 2-form lattice gauge
theory\, which is dual of the abelian Higgs model in continuum limit. The
linear confining potential appears in a confinement phase and it disappear
s in a deconfinement phase. The phase diagram of the theory is also studie
d.\n\nhttps://conference-indico.kek.jp/event/76/contributions/1482/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1482/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Phase transitions in matrix models
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1483@conference-indico.kek.jp
DESCRIPTION:Speakers: Enrico Rinaldi (Riken)\nWe discuss new results in th
e BFSS matrix model and its bosonic variant.\n\nhttps://conference-indico.
kek.jp/event/76/contributions/1483/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1483/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Complex Langevin Simulations: Reliability and applications to full
QCD at non-zero density
DTSTART;VALUE=DATE-TIME:20190624T011000Z
DTEND;VALUE=DATE-TIME:20190624T013500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1484@conference-indico.kek.jp
DESCRIPTION:Speakers: Manuel Scherzer (Institute for theoretical Physics\,
Heidelberg University)\nM. Scherzer\, E. Seiler\, D. Sexty and I.-O. Stam
atescu Complex Langevin (Equation) is a well defined method providing a ge
neral instrument for ab initio\, approximation free studies of realistic l
attice models even for complex action. The latter include full QCD at fini
te density and CLE appears as the only method presently applied in this co
ntext. The complexification of the variable space required by a complex ac
tion introduces\, however\, special conditions to be satisfied in order to
ensure correct convergence. Analyzing these conditions led to the develop
ment of procedures and criteria which allow to control the simulations and
define physical reliability regions. We here develop one essential condit
ion directly related to the correctness proof to a general criterion appli
cable on-line also to QCD and discuss its relation to other criteria. We a
lso present full QCD CLE results for the transition from the confinement t
o the deconfined phase for $0 \\le \\mu / T_c( \\mu=0) \\le 5$ and for obs
ervables vs $\\mu$ at high temperature.\n\nhttps://conference-indico.kek.j
p/event/76/contributions/1484/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1484/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Exploring the QCD phase diagram via reweighting from isospin chemi
cal potential
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1485@conference-indico.kek.jp
DESCRIPTION:Speakers: Sebastian Schmalzbauer (ITP\, Goethe University)\nWe
investigate the QCD phase diagram close to the isospin chemical potential
axis. Numerical simulations directly along this axis are not hindered by
the sign problem and pion condensation can be observed at high enough valu
es of the isospin chemical potential. The possibility of a crossover trans
ition from this BEC phase to a BCS phase is investigated. We study how the
BEC phase boundary evolves in the baryon and strangeness chemical potenti
al directions via reweighting in the quark chemical potentials and discuss
our results. Furthermore\, we develop an alternative method to approach n
onzero baryon chemical potentials. This involves simulations including aux
iliary quarks of an extended isospin doublet and decoupling them by increa
sing their mass\, again via reweighting.\n\nhttps://conference-indico.kek.
jp/event/76/contributions/1485/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1485/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Confinement/deconfinement phase transition for quarks in the highe
r representation in view of dual superconductivity
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1486@conference-indico.kek.jp
DESCRIPTION:Speakers: Akihiro Shibata (Computing Research Center\, KEK)\nD
ual superconductor picture is one of the most promising scenarios for quar
k confinement. We have proposed a new formulation of Yang-Mills theory on
the lattice so that the so-called restricted field obtained from the gauge
-covariant decomposition plays the dominant role in quark confinement. Thi
s framework improves the Abelian projection in the gauge-independent manne
r. For quarks in the fundamental representation\, we have demonstrated som
e numerical evidences for the dual superconductivity. However\, it is know
n that the expected behavior of the Wilson loop in higher representations
cannot be reproduced if the restricted part of the Wilson loop is extracte
d by adopting the Abelian projection or the field decomposition naively in
the same way as in the fundamental representation. Recentry\, by virtue o
f the non-Abelian Stokes theorem for the Wilson loop operator\, we have pr
oposed suitable operators constructed from the restricted field only in th
e fundamental representation to reproduce the correct behavior of the orig
inal Wilson loop in higher representations. We have further demonstrated b
y the numerical simulation that the proposed operators well reproduce the
expected behavior of the original Wilson loop average\, which overcomes th
e problem that occurs in naively applying Abelian-projection to the Wilson
loop operator for higher representations. In this talk\, we focus on the
the confinement and deconfinement phase transition for quarks in the highe
r representations at finite temperature in view of the dual superconductiv
ity. By using our new formulation of lattice Yang-Mills theory and numeric
al simulations on the lattice\, we extract the dominant mode for confineme
nt by decomposing the Yang-Mills field\, and we investigate the Polyakov l
oop average\, static quark potential for both Yang-Mills field and decompo
sed restricted field in both confinement and deconfinement phase at finite
temperature.\n\nhttps://conference-indico.kek.jp/event/76/contributions/1
486/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1486/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The Schwinger mechanism with perturbative electric fields
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1487@conference-indico.kek.jp
DESCRIPTION:Speakers: Hidetoshi Taya (Fudan University)\nI discuss spontan
eous particle production from the vacuum (the Schwinger mechanism) in the
presence of a strong slow electric field superimposed by a fast weak elect
ric field. I analytically/numerically show that a QED analog of the Franz-
Keldysh effect occurs\, which significantly modifies the spectrum of the p
roduced particles. I also show that a non-trivial spin-dependence appears
in the production even without magnetic fields due to the intrinsic spin-o
rbit coupling in the Dirac equation if the weak electric field is transver
se with respect to the strong electric field. Implications to experiments/
observations (e.g. heavy ion collisions\, lasers) and relations to the dyn
amically assisted Schwinger mechanism are also discussed.\n\n[1] H. Taya "
Franz-Keldysh effect in strong-field QED\," PRD 99\, 056006 (2019)\n\n[2]
X.-G. Huang\, M. Matsuo\, H. Taya\, "Spontaneous generation of spin curren
t from the vacuum by strong electric fields\," arXiv:1904.07593\n\n[3] X.-
G. Huang\, H. Taya\, "Spin-dependent dynamically assisted Schwinger mechan
ism\," arXiv:1904.08200\n\nhttps://conference-indico.kek.jp/event/76/contr
ibutions/1487/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1487/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The order of phase transition in three flavor QCD with background
magnetic field in crossover regime
DTSTART;VALUE=DATE-TIME:20190626T011000Z
DTEND;VALUE=DATE-TIME:20190626T013500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1488@conference-indico.kek.jp
DESCRIPTION:Speakers: Akio Tomiya (RIKEN-BNL)\nWe investigate the order of
phase transition in three flavor QCD with a background U(1) magnetic fiel
d using the standard staggered action with the plaquette gauge action. We
perform simulations for three volumes $N_\\sigma=8\,16\,24$ with fixed mas
s $ma=0.030$ and temporal extent $N_\\tau=4$\, which is expected to show c
rossover for vanishing magnetic field. We apply physically same magnitude
of magnetic field $\\sqrt{eB}=0.9$ for each volume. We measure the chiral
condensates and Polyakov loop and calculate their susceptibility and Binde
r cumulant. We find that the transition becomes first order like transitio
n with hysteresis in the Monte-Carlo history from crossover for non-zero m
agnetic field on the system.\n\nhttps://conference-indico.kek.jp/event/76/
contributions/1488/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1488/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The Schwinger model in the canonical formulation
DTSTART;VALUE=DATE-TIME:20190626T072000Z
DTEND;VALUE=DATE-TIME:20190626T074500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1489@conference-indico.kek.jp
DESCRIPTION:Speakers: Urs Wenger (University of Bern)\nWe consider the mas
sive Schwinger model in the canonical formulation using transfer matrices
in fixed fermion number sectors. The fermion contributions can be classifi
ed according to the discrete\, local fermion occupation numbers which defi
ne specific fermion states. They can be used to expose the vacuum structur
e of the theory and the origin of the sign problem at finite fermion numbe
r density. We construct observables which can be used to calculate the gro
und state energy and the spectrum of the theory. Finally\, we discuss the
relation of the canonical formulation to the fermion loop and fermion bag
formulation and comment on possible solutions to the fermion sign problem.
\n\nhttps://conference-indico.kek.jp/event/76/contributions/1489/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1489/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ginzburg-Landau theory for neutron 3P2 superfluidity in neutron st
ars
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1490@conference-indico.kek.jp
DESCRIPTION:Speakers: Shigehiro Yasui (Keio University)\nThe neutron 3P2 s
uperfluidity is one of the interesting phases inside the neutron stars. In
this presentation\, we will discuss their properties based on the Ginzbur
g-Landau theory derived from the tensor-type interaction between two neutr
ons. We will show the strong magnetic effect relevant to the magnetars\, t
he boundary effect near the surface of the neutron stars\, and some relate
d topological properties.\n\nhttps://conference-indico.kek.jp/event/76/con
tributions/1490/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1490/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The QCD critical point hunt: new dynamic framework and first simul
ation results
DTSTART;VALUE=DATE-TIME:20190625T020000Z
DTEND;VALUE=DATE-TIME:20190625T024500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1491@conference-indico.kek.jp
DESCRIPTION:Speakers: Yi Yin (MIT)\nThe on-going heavy-ion collision exper
iments at RHIC is scanning the baryon-rich regime of the QCD phase diagram
with an unprecedented precision that would potentially discover the QCD c
ritical point\, the landmark point in the phase diagram. On the theory fro
nt\, conventional hydrodynamic modeling would not be sufficient for the cr
itical point hunt. Instead\, I will present a novel theoretical framework\
, namely "hydro+"\, which couples critical fluctuations to bulk evolution
of the "fireball" created in heavy-ion collisions. I will show the first r
esults on the numerical simulations of "hydro+"\, and\, if time is permitt
ed\, discuss the interesting connection of "hydro+" to other approaches of
fluctuating hydrodynamics.\n\nhttps://conference-indico.kek.jp/event/76/c
ontributions/1491/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1491/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Shear viscosity of classical fields in Yang-Mills theory
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1492@conference-indico.kek.jp
DESCRIPTION:Speakers: Hidefumi Matsuda (Graduate school of science\, Kyoto
university)\nThe created matter in the initial stage of relativistic hea
vy ion collisions is described well by the classical Yang-Mills(CYM) field
s. It has been shown that the dynamics of the CYM fields play a significan
t role in the realization of an local thermal equilibrium. In this work\,
we expect that the CYM fields itself have hydrodynamical property such as
transport coefficient in equilibrium. We discuss the shear viscosity of th
e classical fields in the CYM theory using the Green-Kubo formula. We show
that the time correlation function of energy-momentum tensor in equilibri
um shows a monotonous decay with an exponential form and the shear viscosi
ty can be well evaluated by the contribution from the exponential decay.\n
\nhttps://conference-indico.kek.jp/event/76/contributions/1492/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1492/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Complex poles and spectral function of the Landau gauge gluon prop
agator: effects of quark flavors
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1493@conference-indico.kek.jp
DESCRIPTION:Speakers: Yui Hayashi (Chiba University)\nThe analytic structu
res of propagators have kinematic information and are important to underst
and the color confinement\; in particular\, the existence of complex poles
is a signal of confinement for the corresponding particle. We derive gene
ral relationships between the number of complex poles of a propagator and
the spectral function under some assumptions on the asymptotic behaviors o
f the propagator. We apply this relation to the massive Yang-Mills model\,
which is an effective model of the Landau gauge Yang-Mills theory\, to sh
ow that the gluon propagator in this model has two complex poles. We consi
der the flavor effects on the analytic structure of the gluon propagator i
n the massive Yang-Mills model with quarks and also discuss effects of fin
ite temperature and chemical potential towards understanding the QCD phase
s in relation with the analytic structures of the propagators in the Landa
u gauge QCD.\n\nhttps://conference-indico.kek.jp/event/76/contributions/14
93/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1493/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Formulating relativistic hydrodynamics with spin polarization
DTSTART;VALUE=DATE-TIME:20190625T031000Z
DTEND;VALUE=DATE-TIME:20190625T033500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1494@conference-indico.kek.jp
DESCRIPTION:Speakers: Masaru Hongo (Keio University)\nRecently\, there hav
e been significant experimental progresses in observing and controlling sp
in-dependent bulk quantities in broad areas in physics such as relativisti
c heavy-ion collisions and spintronics. Although hydrodynamics is one of t
he most powerful theoretical frameworks to describe such macroscopic bulk
quantities\, its extension to a spinful fluid has not been fully developed
\, especially for relativistic systems. In this study\, we formulate dissi
pative relativistic hydrodynamics with a dynamical spin degree of freedom
based on the phenomenological entropy-current analysis [1]. With the help
of the first and second laws of local thermodynamics\, we constrain the po
ssible constitutive relations for a relativistic spinful fluid. In additio
n\, we perform the linear-mode analysis on the top of global thermal equil
ibrium\, and clarify that spin density gives a non-hydrodynamic diffusive
mode with a finite lifetime. This diffusive behavior is a consequence of t
he mutual convertibility between spin and orbital angular momentum. \n\n[1
] K. Hattori\, M. Hongo\, X.-G. Huang\, M. Matsuo\, H. Taya\, "Fate of spi
n polarization in a relativistic fluid: An entropy-current analysis\," arX
iv:1901.06615\n\nhttps://conference-indico.kek.jp/event/76/contributions/1
494/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1494/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gluon propagator in two-color dense QCD: Massive Yang-Mills approa
ch
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1495@conference-indico.kek.jp
DESCRIPTION:Speakers: Daiki Suenaga (Central China Normal University)\nWe
study the Landau gauge gluon propagators in dense two-color QCD at quark c
hemical potential. In order to take into account the non-perturbative effe
cts in the infrared regime\, we use the massive Yang-Mills theory which ha
s successfully described the gluon and ghost propagators in the Landau gau
ge within the one-loop approximation measured on the lattice. We couple qu
arks to this theory and compute the one-loop polarization effects. Dense m
atter in two-color QCD should possesses the diquark condensate which is co
lor-singlet\, and hence neither electric nor magnetic screening effects ap
pear at the scale less than the diquark gap. This infrared behavior explai
ns the lattice results which show the insensitivity of screening masses to
the quark density.\n\nhttps://conference-indico.kek.jp/event/76/contribut
ions/1495/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1495/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Rotating neutron star in strong magnetic fields and the MR relatio
ns
DTSTART;VALUE=DATE-TIME:20190624T031500Z
DTEND;VALUE=DATE-TIME:20190624T034000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1496@conference-indico.kek.jp
DESCRIPTION:Speakers: Chinatsu Watanabe (Saitama University)\nNeutron star
s are highly magnetized rotating compact stars. In 2010\, a neutron star n
amed PSR J1614-2230 has a mass of twice the solar mass (1.97$\\pm$0.04M$\\
odot$). In 2013\, a neutron star named PSR J0348+0432 with a mass of 2.01$
\\pm$0.04M$\\odot$ was observed. Such massive neutron stars give strong co
nstraints on the equation of state (EoS) of neutron star matter. In this s
tudy\, we calculate radius of a neutron star using a perturbative prescrip
tion for various EoSs and relations of its total mass increased by magneti
c fields. Also\, we calculate the radius of the neutron star as a function
of its total mass increased by rotation. As for the EoS\, we use RMF theo
ry. Moreover\, we calculate mass-radius (MR) relation with both rotation a
nd magnetic fields using 5 hadronic EoSs. We have the results of MR relati
on with both rotation and magnetic fields have the total mass of over twic
e the solar mass for all 5 hadronic EoSs.\n\nhttps://conference-indico.kek
.jp/event/76/contributions/1496/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1496/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lattice field theory with torsion
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1497@conference-indico.kek.jp
DESCRIPTION:Speakers: Shota Imaki (The University of Tokyo)\nWe formulate
lattice field theory with dislocation. The dislocation realizes the spacet
ime torsion in the continuum limit. As the first application\, we perform
the numerical computation to analyze the generation of the current induced
by the screw dislocation\, which we call the “chiral torsional effect
”.\n\nhttps://conference-indico.kek.jp/event/76/contributions/1497/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1497/
END:VEVENT
BEGIN:VEVENT
SUMMARY:In-medium heavy quark potential from lattice QCD and the generaliz
ed Gauss-law
DTSTART;VALUE=DATE-TIME:20190625T074000Z
DTEND;VALUE=DATE-TIME:20190625T080500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1498@conference-indico.kek.jp
DESCRIPTION:Speakers: Alexander Rothkopf (University of Stavanger)\nIn thi
s talk I report on recent progress in the determination of the complex hea
vy quark potential from lattice QCD simulations [1] and show how its tempe
rature dependence can be captured in an analytic parametrization based on
an improved generalized Gauss law model [2]. Prospects for in-medium quark
onium phenomenology are discussed.\n\n[1] P. Petreczky\, A.R.\, J.Weber\,
NPA982 (2019) 735 and in progress\n\n[2] D. Lafferty\, A.R. in preparation
\n\nhttps://conference-indico.kek.jp/event/76/contributions/1498/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1498/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Center symmetry and the sign problem of finite density lattice gau
ge theory
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1499@conference-indico.kek.jp
DESCRIPTION:Speakers: Shinji Ejiri (Niigata University)\nWe study the phas
e transition of quantum chromodynamics (QCD) at finite temperature and den
sity by focusing on the probability distribution function of quark density
. The phase transition of QCD is expected to change its properties as the
density changes\, and the probability distribution function gives importan
t information for understanding the nature of the phase transition. The nu
merical simulation of QCD at high density has the serious problem of "sign
problem". In this study\, we consider the center symmetry\, which is impo
rtant for understanding the phase transition of lattice gauge theory\, and
propose a method to avoid the sign problem using the symmetry. In this wa
y\, we aim to establish a method to calculate probability distribution fun
ctions of physical quantities such as quark density by numerical simulatio
n.\n\nhttps://conference-indico.kek.jp/event/76/contributions/1499/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1499/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Axial kinetic theory and spin transport for massive fermions
DTSTART;VALUE=DATE-TIME:20190625T062000Z
DTEND;VALUE=DATE-TIME:20190625T064500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1500@conference-indico.kek.jp
DESCRIPTION:Speakers: Di-Lun Yang (Keio University)\nIn relativistic heavy
ion collisions (HIC)\, not only a strong magnetic field but also strong v
orticity could be generated. Recent observations of the polarization of La
mbda hyperons have triggered intensive studies for vorticity-induced polar
ization and spin dynamics in relativistic fluids. However\, more recent st
udies suggest that the spin polarization could be possibly led by non-equi
librium effects. It is thus desired to construct a quantum transport theor
y for investigating non-equilibrium dynamics of spin polarization for mass
ive fermions. Based on the Wigner-function approach\, we derive an axial k
inetic theory (AKT) for massive fermions as modified Boltzmann equations i
nvolving quantum corrections associated with spin and chiral anomaly\, whi
ch can be applied to track the phase-space evolution of both vector/axial
charges and spin polarization in weakly coupled systems. Since spin of mas
sive fermions is a dynamical degree of freedom\, the AKT involves one scal
ar and one axial-vector kinetic equations with side-jump effects pertinent
to the spin-orbit interaction. In the massless limit\, the AKT also repro
duces the chiral kinetic theory as a well-established quantum kinetic theo
ry for Weyl fermions and manifests the spin enslavement in such a limit. T
he AKT could have various applications in different physical systems inclu
ding the spin transport for strange quarks or for Lambda hyperons in HIC.\
n\nhttps://conference-indico.kek.jp/event/76/contributions/1500/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1500/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Improved algorithms for generalized thimble method
DTSTART;VALUE=DATE-TIME:20190626T061000Z
DTEND;VALUE=DATE-TIME:20190626T063500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1501@conference-indico.kek.jp
DESCRIPTION:Speakers: Andrei Alexandru (The George Washington University)\
nQuestions about quantum field theories at non-zero chemical potential and
/or real-time correlators are often impossible to investigate numerically
due to the sign problem. A possible solution to this problem is to deform
the integration domain for the path integral in the complex plane. Samplin
g configurations on these manifolds is challenging. In this talk I will di
scuss some of these problems\, present solutions we have found and the dir
ections we are currently pursuing.\n\nhttps://conference-indico.kek.jp/eve
nt/76/contributions/1501/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1501/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Relation between chirality imbalance and fermion pair-production u
nder the parallel electromagnetic field
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1502@conference-indico.kek.jp
DESCRIPTION:Speakers: Hayato Aoi (Tokyo University of Science)\nThere has
been recently an increasing interest for study of the chirality imbalance
$n_5$\, which is the difference between right- and left-handed fermions. T
he chirality imbalance is expected to be arised from the axial anomaly and
plays a key role to understand anomalous transport phenomena in the hot/d
ense quark matter or the Dirac/Weyl semimetals under the magnetic field. O
ne of interesting transport phenomena in the presence of chirality imbalan
ce is the chiral magnetic effect(CME)\, appearance of electric current in
direction of the external magnetic field. However\, the electric field giv
es a crucial contribution to the emergence of the chirality imbalance in a
ddition to the magnetic field. In the previous work\, we have studied the
chirality imbalance and the CME using the analytical solution of the Dirac
equation in the constant magnetic and Sauter-type pulsed electric fields\
, and found that the time-dependence of the gauge field is essentially imp
ortant for the production of $n_5$. Here\, we try to extend our study to t
he general time-dependent electric field\, and discuss a relation between
$n_5$ and the fermion pair-production from the vacuum. In this talk\, we s
tudy the time evolution of the chirality imbalance and the electric curren
t under spatially-uniform and parallel electromagnetic field in the vacuum
of massive fermion. For the time-dependence\, we assume the constant magn
etic field\, but do not impose any specific form for the electric field wi
th boundary conditions $E(t \\to \\pm \\infty) \\to 0$. We solve the Dirac
equation and calculate vacuum expectation values of the currents with the
gauge invariant regularization. In particular\, we find that $n_5$ and CM
E at $t \\to \\infty$ are solely determined by the probability distributio
ns of the fermion created non-perturbatively by the electric field. As a r
esult\, asymptotic forms of $n_5$ and CME consists of a constant part and
an oscillating part independent of details of intermediate time-dependence
of the gauge potential. The non-zero constant term is proportional to a r
elativistic velocity and the momentum distribution of the created particle
\, and understood as a classical analogue of the electric current. We disc
uss how the chirality imbalance arises and roles of the electromagnetic fi
elds in detail.\n\nhttps://conference-indico.kek.jp/event/76/contributions
/1502/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1502/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quark-hadron continuity beyond Ginzburg-Landau paradigm
DTSTART;VALUE=DATE-TIME:20190624T063000Z
DTEND;VALUE=DATE-TIME:20190624T065500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1503@conference-indico.kek.jp
DESCRIPTION:Speakers: Yuji Hirono (Asia Pacific Center for Theoretical Phy
sics)\nQuark-hadron continuity [1] is a scenario that hadronic matter is c
ontinuously connected to color superconductor without phase transitions as
the baryon chemical potential increases. This scenario is based on Landau
's classification of phases since they have the same symmetry breaking pat
tern. We address the question whether this continuity is true as quantum p
hases of matter\, which requires the treatment beyond Ginzburg-Landau desc
ription [2\,3]. To examine the topological nature of color superconductor\
, we derive a dual effective theory for U(1) Nambu-Goldstone (NG) bosons a
nd vortices of the color-flavor locked phase\, and discuss the fate of eme
rgent higher-form symmetries. The theory has the form of a topological BF
theory coupled to NG bosons\, and fractional statistics of test quarks and
vortices arises as a result of an emergent Z3 two-form symmetry. We find
that this symmetry is not spontaneously broken\, indicating that quark-had
ron continuity is still a consistent scenario.\n\n[1] T. Schafer and F. Wi
lczek\, Phys.Rev.Lett. 82 (1999) 3956-3959.\n\n[2] Y. Hirono\, Y. Tanizaki
\, Phys. Rev. Lett.\, in press [arXiv:1811.10608]\n\n[3] Y. Hirono\, Y. Ta
nizaki\, [arXiv:1904.08570]\n\nhttps://conference-indico.kek.jp/event/76/c
ontributions/1503/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1503/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Chiral soliton lattice in dense matter under rotation
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1504@conference-indico.kek.jp
DESCRIPTION:Speakers: Kentaro Nishimura (Keio University)\nWe study anomal
y-induced effects on dense QCD matter under rotation. We show that the chi
ral perturbation theory under rotation has the topological term that accou
nts for the chiral vortical effect. We find that\, due to the presence of
this new term\, the ground state of QCD under rotation is the chiral solit
on lattice (CSL) for the neutral pion or η' meson. This state is a period
ic array of topological solitons which spontaneously breaks parity and con
tinuous translational symmetries. In particular\, the CSL for the η' meso
n is energetically more favorable than the QCD vacuum and that of the neut
ral pion when the baryon chemical potential is much larger than the isospi
n chemical potentials.\n\nhttps://conference-indico.kek.jp/event/76/contri
butions/1504/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1504/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Real-Time-Evolution of Heavy-Quarkonium Bound States
DTSTART;VALUE=DATE-TIME:20190625T080500Z
DTEND;VALUE=DATE-TIME:20190625T083000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1505@conference-indico.kek.jp
DESCRIPTION:Speakers: Alexander Lehmann (Heidelberg University and Univers
ity of Stavanger)\nElucidating the production process of heavy quark bound
states is a central goal in heavy-ion collisions [1]. Two central questio
ns exist: Do bound states of heavy quarks form in the early time evolution
of the glasma? If so\, in which time regime can that happen? An answer re
quires the development of a non-perturbative treatment of the real-time-dy
namics of heavy quarkonia. To answer those questions we have developed a n
ovel real-time formulation [2] of lattice NRQCD [3\,4] to order $1/(aMq)^2
$ where we employ a classical statistical simulation for the early-time dy
namics of the gauge fields [5]. Here we present results from a simulation
of heavy quarkonium dynamics in the glasma. By computing the time-evolutio
n of spectral functions of heavy quarkonium channels we expect to identify
the emergence of bound states and their formation time in the evolving gl
asma.\n\n[1] G. Aarts et al.\, Eur. Phys. J. A 53 no.5\, 93 (2017)\n\n[2]
A. L.\, A. Rothkopf (in preparation)\n\n[3] G.P. Lepage et al.\, Phys.Rev.
D 46\, 4052 (1992)\n\n[4] M. Berwein\, N. Brambilla\, S. Hwang\, A. Vairo
\, TUM-EFT 74/15\, 56 pp (2018)\n\n[5] K. Boguslasvki\, A. Kurkela\, T. La
ppi\, J. Peuron\, Phys.Rev. D98 no.1\, 014006 (2018)\n\nhttps://conference
-indico.kek.jp/event/76/contributions/1505/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1505/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hydrodynamic fluctuations and fluctuation theorem in heavy-ion col
lisions
DTSTART;VALUE=DATE-TIME:20190625T024500Z
DTEND;VALUE=DATE-TIME:20190625T031000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1506@conference-indico.kek.jp
DESCRIPTION:Speakers: Koichi Murase (Sophia University)\nRecently the effe
cts of hydrodynamic fluctuations\, i.e.\, the thermal fluctuations of rela
tivistic hydrodynamics\, on flow observables in high-energy nuclear collis
ions are analyzed in event-by-event simulations by dynamical models. The s
tatistics of the hydrodynamic fluctuations is usually determined by the fl
uctuation-dissipation theorem obtained in the global equilibrium. However\
, in expanding systems such as matter created in the experiments\, the flu
ctuation-dissipation theorem is non-trivial. Fluctuation theorem is more g
eneral theorem that describes the probability distribution of the entropy
production and is applicable to any non-equilibrium systems. We discuss th
e fluctuation-dissipation relation in expanding systems and its relation t
o the fluctuation theorem by performing the numerical simulations of non-l
inear relativistic fluctuating hydrodynamics assuming the Bjorken flow.\n\
nhttps://conference-indico.kek.jp/event/76/contributions/1506/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1506/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Non-Abelian vortices in dense QCD: quark-hadron continuity and non
-Abelian statistics
DTSTART;VALUE=DATE-TIME:20190624T060500Z
DTEND;VALUE=DATE-TIME:20190624T063000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1507@conference-indico.kek.jp
DESCRIPTION:Speakers: Muneto Nitta (Keio University)\nQuark-hadron continu
ity was proposed as crossover between hadronic matter and quark matter wit
hout a phase transition\, based on the matching of the symmetry and excita
tions in both phases. In the limit of a light strange-quark mass\, it conn
ects hyperon matter and the color-flavor-locked phase exhibiting color sup
erconductivity. Here\, we argue that three hadronic superfluid vortices mu
st combine with three non-Abelian vortices with different colors with the
total color magnetic fluxes canceled out through a junction called a color
ful boojum. We prove this based on the Aharonov-Bohm phases of quarks arou
nd vortices. We then discuss non-Abelian statistics of non-Abelian vortice
s based on the Bogoliubov-de Gennes equation and possible application to t
he above continuity.\n\nhttps://conference-indico.kek.jp/event/76/contribu
tions/1507/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1507/
END:VEVENT
BEGIN:VEVENT
SUMMARY:On the multiple thimbles decomposition for the Thirring model
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1508@conference-indico.kek.jp
DESCRIPTION:Speakers: Kevin Zambello (University of Parma and INFN\, Grupp
o Collegato di Parma)\nLefschetz thimbles regularization is an elegant way
to overcome the sign problem. By integrating over thimbles\, where the im
aginary part of the action stays constant and can be factored out\, the si
gn problem disappears and observables of interest may be computed by Monte
Carlo simulations. Still\, many examples are known so far where the corre
ct results can only be recovered by taking into account multiple thimbles\
; therefore one is left with the difficult task of collecting their contri
butions. The Thirring model is one of such examples: this theory has a ric
h thimble structure and it has been shown that one cannot reproduce the re
sults of the full theory from the dominant thimble alone. Using the model
as a test bench for the calculation techniques we have developed in Parma\
, we report preliminary results on reproducing the complete results from m
ultiple thimbles simulations.\n\nhttps://conference-indico.kek.jp/event/76
/contributions/1508/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1508/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Thermal Quarkonium Mass Shift from Euclidean Correlators
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1509@conference-indico.kek.jp
DESCRIPTION:Speakers: Alexander Maximilian Eller (TU Darmstadt)\nBrambilla
et al. have derived an effective description of quarkonium with two param
eters: a momentum diffusion term which has been widely explored within the
community\, and a real self-energy term. We derive a relation between the
self-energy term and Euclidean electric field correlators along a Polyako
v line\, which can directly be studied on the lattice without the need for
analytical continuation. We also discuss the problems in determining the
correlator within the scope of the quenched QCD approximation.\n\nhttps://
conference-indico.kek.jp/event/76/contributions/1509/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1509/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Pion condensation -chpt versus lattice
DTSTART;VALUE=DATE-TIME:20190626T032000Z
DTEND;VALUE=DATE-TIME:20190626T034500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1510@conference-indico.kek.jp
DESCRIPTION:Speakers: Jens Oluf Andersen (Norwegian University of Science
and Technology)\nIn this talk I will discuss pion condensation and the pha
se diagram at finite temperature and isospin density. I will present resul
ts for the quark-meson model and chiral perturbation theory. The results f
or the phase diagram\, pressure and equation of state are compared with re
cent lattice results. I will also present results for pion stars that cons
ist of a Bose condensate of pion electromagnetically neutralized by lepton
s.\n\nhttps://conference-indico.kek.jp/event/76/contributions/1510/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1510/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Thermodynamic properties of QGP at the physical point with the gra
dient flow method.
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1511@conference-indico.kek.jp
DESCRIPTION:Speakers: Kazuyuki Kanaya (Tomonaga Center for the History of
the Universe\, University of Tsukuba)\nWe study thermodynamic properties o
f 2+1 flavor QCD on the lattice applying the method of Makino and Suzuki b
ased on the gradient flow\, using a nonperturbatively $O(a)$-improved Wils
on quark action and the renormalization group-improved Iwasaki gauge actio
n. I report on results of the energy momentum tensor and chiral condensate
obtained so far from our on-going simulations at the physical point.\n\nh
ttps://conference-indico.kek.jp/event/76/contributions/1511/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1511/
END:VEVENT
BEGIN:VEVENT
SUMMARY:QCD Topology to High Temperatures via Improved Reweighting
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1512@conference-indico.kek.jp
DESCRIPTION:Speakers: P. Thomas Jahn (Technische Universität Darmstadt)\n
At high temperatures\, the topological susceptibility of QCD becomes relev
ant for the properties of axion dark matter. However\, the strong suppress
ion of non-zero topological sectors causes ordinary sampling techniques to
fail\, since fluctuations of the topological charge can only be measured
reliably if enough tunneling events between sectors occur. We present an i
mprovement of a technique the we recently developed to circumvent this pro
blem based on a combination of gradient flow and reweighting techniques an
d quote first results of the topological susceptibility in pure SU(3) Yang
-Mills theory up to $7~T_\\mathrm c$.\n\nhttps://conference-indico.kek.jp/
event/76/contributions/1512/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1512/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Studying the QCD phase diagram in RHIC-BES at STAR
DTSTART;VALUE=DATE-TIME:20190625T000000Z
DTEND;VALUE=DATE-TIME:20190625T004500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1513@conference-indico.kek.jp
DESCRIPTION:Speakers: Toshihiro Nonaka (Central China Normal University)\n
Exploring the QCD phase structure is one of the ultimate goals of high-ene
rgy heavy-ion colliding experiments. At BNL-RHIC\, the Beam Energy Scan (B
ES-I) program was carried out from 2010 to 2014\, and many data sets have
been collected by the STAR experiment in various collision energies from $
\\sqrt{s_{NN}} =$ 200 GeV down to 7.7 GeV in Au+Au collisions. In order to
reduce the uncertainties in the interested energy region (7.7 $\n\nhttps:
//conference-indico.kek.jp/event/76/contributions/1513/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1513/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Conductivity of quark-gluon plasma in the presence of external mag
netic field
DTSTART;VALUE=DATE-TIME:20190626T004500Z
DTEND;VALUE=DATE-TIME:20190626T011000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1514@conference-indico.kek.jp
DESCRIPTION:Speakers: Aleksandr Nikolaev (Swansea University)\nWe examine
the electric conductivity of quark-gluon plasma in the presence of externa
l magnetic field B within LQCD formulation for few temperatures in the dec
onfinement phase. Ensembles are generated with dynamical staggered 2+1 qua
rks at physical quark masses. At first we measure the electromagnetic curr
ent-current Euclidean correlators along and perpendicular to the magnetic
field\, then extract the conductivity via analytical continuation within t
he Backus-Gilbert method. We obtain\, that $\\sigma_\\parallel$ grows in t
he direction of magnetic field and $\\sigma_\\perp$ decreases. Thus we obs
erve the Chiral Magnetic Effect in quark-gluon plasma.\n\nhttps://conferen
ce-indico.kek.jp/event/76/contributions/1514/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1514/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Universal scaling of conserved charge in the stochastic diffusion
dynamics
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1515@conference-indico.kek.jp
DESCRIPTION:Speakers: Shanjin Wu (Peking University)\nIn this work\, we ex
plore the Kibble-Zurek scaling of the conserved charge\, using the stachas
tic diffusion dynamics. After determining the characteristic scales $\\tau
_{\\tiny KZ}$ and $l_{\\tiny KZ}$ and properly rescaling the traditional c
orrelation function and cumulant\, we construct universal functions for bo
th the two-point correlation function $C(y_1-y_2\;\\tau)$ and second-order
cumulant $K(\\Delta y\,\\tau)$ of the conserved charge in the critical re
gime\, which are insensitive to the initial temperature and a parameter in
the mapping between 3D Ising model and the hot QCD system near the critic
al point.\n\nhttps://conference-indico.kek.jp/event/76/contributions/1515/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1515/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Linked cluster expansion method for the SU(3) spin models
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1516@conference-indico.kek.jp
DESCRIPTION:Speakers: Anh Quang Pham (Goethe University Frankfurt)\nAn $SU
(3)$ spin model is often used in the literature as a first step to deal wi
th QCD at finite chemical potential. It approximates full lattice QCD in t
he strong coupling and large fermion-mass limit. We describe a series expa
nsion method called Linked Cluster Expansion (LCE)\, and how to apply it t
o the spin model. The results are series of several couplings\, which we a
nalyze by generalized Padé approximants\, called Partial Differential App
roximants (PDAs). This method allows complex multi-critical behavior of qu
ark matter to be investigated. We compare our results with those from comp
lex Langevin and flux representation. We also indicate a couple of open pr
oblems.\n\nhttps://conference-indico.kek.jp/event/76/contributions/1516/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1516/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The Kondo effect in dense QCD
DTSTART;VALUE=DATE-TIME:20190624T054000Z
DTEND;VALUE=DATE-TIME:20190624T060500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1517@conference-indico.kek.jp
DESCRIPTION:Speakers: Koichi Hattori (Yukawa Institute\, Kyoto University)
\nWe discuss Kondo effect occurring in dense QCD [1\,2]. Based on the reno
rmalization-group analysis\, we show that effective coupling strengths bet
ween ungapped and gapped quarks in the two-flavor color superconducting (2
SC) phase are renormalized by logarithmic quantum corrections\, which driv
es the system into a strongly coupled regime [2]. This is a characteristic
behavior observed in the Kondo effect\, which has been known to occur in
the presence of impurity catterings via non-Abelian interactions. We propo
se a novel Kondo effect emerging without doped impurities\, but with the g
apped quasiexcitations and the residual SU(2) color subgroup intrinsic in
the 2SC phase\, which we call the 2SC Kondo effect [2]. The Kondo effect i
s a consequence of the dimensional reduction near the Fermi surface\, and
an analogous dimensional reduction in a strong magnetic field is also know
n to induce similar phenomena [3\, 4].\n\n[1] Hattori\, Itakura\, Ozaki\,
Yasui\, "QCD Kondo effect: quark matter with heavy-flavor impurities\," Ph
ys.Rev. D92 (2015) 065003.\n\n[2] Hattori\, Huang\, Pisarski\, "Emergent Q
CD Kondo effect in two-flavor color superconducting phase\," [arXiv:1903.1
0953 [hep-ph]].\n\n[3] Gusynin\, Miransky\, Shovkovy\, "Dimensional reduct
ion and dynamical chiral symmetry breaking by a magnetic field in (3+1)-di
mensions\," Phys.Lett. B349 (1995) 477-483.\n\n[4] Ozaki\, Itakura\, Kuram
oto\, "Magnetically induced QCD Kondo effect\," Phys.Rev. D94 (2016) 07401
3.\n\nhttps://conference-indico.kek.jp/event/76/contributions/1517/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1517/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Complex Langevin applied to chiral random matrix model in T-mu pla
ne
DTSTART;VALUE=DATE-TIME:20190624T004500Z
DTEND;VALUE=DATE-TIME:20190624T011000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1518@conference-indico.kek.jp
DESCRIPTION:Speakers: Hirotsugu Fujii (U Tokyo)\nWe examine the $T-\\mu$ p
hase diagram in the chiral random matrix model in $T-\\mu$ plane by checki
ng the correctness condition\, i.e.\, the tail behavior of the ensemble di
stribution\, with varying the matrix size and other model parameters.\n\nh
ttps://conference-indico.kek.jp/event/76/contributions/1518/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1518/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Neutron star equations of state and quark-hadron continuity
DTSTART;VALUE=DATE-TIME:20190624T025000Z
DTEND;VALUE=DATE-TIME:20190624T031500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1527@conference-indico.kek.jp
DESCRIPTION:Speakers: Toru Kojo (Central China Normal University)\nThe pro
perties of dense QCD matter are delineated through the construction of equ
ations of state which should be consistent with QCD calculations in the lo
w and high density limits\, nuclear laboratory experiments\, and the neutr
on star observations. These constraints\, together with the causality cond
ition of the sound velocity\, are used to develop the picture of hadron-qu
ark continuity in which hadronic matter continuously transforms into quark
matter (modulo small 1st order phase transitions). The resultant unified
equation of state at zero temperature and - equilibrium\, which we call Qu
ark-Hadron-Crossover (QHC18 and QHC19)\, is consistent with the measured p
roperties of neutron stars and in addition gives us microscopic insights i
nto the properties of dense QCD matter.\n\nhttps://conference-indico.kek.j
p/event/76/contributions/1527/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1527/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Catalytic effects of QCD monopoles on the phase transitions
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1519@conference-indico.kek.jp
DESCRIPTION:Speakers: Masayasu Hasegawa (Joint Institute for Nuclear Resea
rch)\nThe existence of monopoles has been theoretically predicted since P.
A. M. Dirac introduced the magnetic monopole in quantum mechanics. Moreov
er\, a large number of experiments to observe monopoles have been conducte
d. However\, monopoles have not been detected yet. The purpose of this res
earch is to find a clue to observe QCD monopoles which closely relate to t
he color confinement by experiments. To find the evidence\, we add the cla
ssical fields of the monopole and the anti-monopole to the QCD vacuum and
calculate the Dirac operator of the overlap fermion which preserves the ex
act chiral symmetry in the lattice gauge theory from the QCD vacuum. We th
en estimate catalytic effects of the additional monopole and anti-monopole
on observables by the numerical calculations. In the study of the low tem
perature\, we have shown that the value of the chiral condensate (defined
as the minus value) decreases\, the pion decay constant increases\, and th
e masses of the light quarks and the mesons become heavy\, by varying the
values of the magnetic charges of the additional monopole and anti-monopol
e. Finally\, we have discovered that the decay width of pion becomes wider
and the lifetime of pion becomes shorter than the experimental results. T
hese are the catalytic effects of monopoles in QCD (arXiv:1807.04808). In
this research\, we add the monopole and anti-monopole to the configuration
s of the finite temperature and investigate catalytic effects of monopoles
in QCD on quark confinement-deconfinement phase transition\, and chiral s
ymmetry breaking and the restoration. We find that the additional monopole
and anti-monopole increase the temperature of quark confinement-deconfine
ment phase transition\, moreover\, the restoration of chiral symmetry brea
king does not occur\, by varying the values of the magnetic charges of the
additional monopole and anti-monopole. In this talk\, we would like to pr
esent our preliminary results about the catalytic effects of QCD monopoles
in the finite temperature.\n\nhttps://conference-indico.kek.jp/event/76/c
ontributions/1519/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1519/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Order of the color superconducting phase transition
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1520@conference-indico.kek.jp
DESCRIPTION:Speakers: Gergely Fejos (Keio University)\nWe investigate via
the functional renormalization group the order of the color superconductin
g phase transition. We calculate the flow of the gauge coupling in a 3d Gi
nzburg-Landau theory and investigate whether it supports the existence of
infrared stable fixed points.\n\nhttps://conference-indico.kek.jp/event/76
/contributions/1520/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1520/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quark mass generation by monopole condensation
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1521@conference-indico.kek.jp
DESCRIPTION:Speakers: Aiichi Iwazaki (Nishogakusha University)\nWe show th
at monopole quark interactions break flavor chiral SU(2) symmetry as well
as\nchiral U(1) symmetry. The interactions induce quark masses when the mo
nopoles condense\neven in the chiral limit (current quark masses vanish.)
The masses are estimated to be\napproximately 20MeV. Thus\, the pions are
not massless even in the chiral limit.\nFurthermore\, the presence of the
interactions leads to the fact that the chiral symmetry breaking and the q
uark confinement simultaneously arises. Because fluctuations of color elec
tric fields are large in dense\nquark matters\, they expel the monopole co
ndensation. Then\, the deconfinement of quarks and the restoration of the
chiral symmetry simultaneously arise.\n\nhttps://conference-indico.kek.jp/
event/76/contributions/1521/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1521/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Measuring chiral susceptibility using gradient flow
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1522@conference-indico.kek.jp
DESCRIPTION:Speakers: Atsushi Baba (University of Tsukuba)\nWe study the c
hiral susceptibility in $N_f = 2+1$ full QCD. In the\nlattice gauge theory
with Wilson fermion\, chiral symmetry is explicitly broken. Therefore\, w
e need a non-trivial additive correction to renormalize the chiral suscept
ibility. To avoid this problem\, we use Gradient flow method. Gradient flo
w method makes us possible to define correctly renormalized chiral suscept
ibility without additive renormalization even if we use Wilson fermion. We
measure not only disconnected diagram but also connected diagram for chir
al susceptibility. This measurement is on finite temperature full QCD with
$N_f=2+1$ Wilson fermion\, and for temperature range 178-348 MeV.\n\nhttp
s://conference-indico.kek.jp/event/76/contributions/1522/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1522/
END:VEVENT
BEGIN:VEVENT
SUMMARY:QCD energy-momentum tensor using gradient flow
DTSTART;VALUE=DATE-TIME:20190626T025500Z
DTEND;VALUE=DATE-TIME:20190626T032000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1523@conference-indico.kek.jp
DESCRIPTION:Speakers: Yusuke Taniguchi (University of Tsukuba)\nWe study t
he energy-momentum tensor in QCD for $N_f$ = 2+1 dynamical quarks. In orde
r to tame violation of the translational invariance on lattice we use the
gradient flow method as a non-perturbative renormalization scheme. We adop
t two values for the up and down quark mass. One is the physical mass with
which we measure the one point function of the energy-momentum tensor and
derive the equation of state in QCD. The other is a rather heavy mass of
about $m_{ud}\\simeq59$ MeV with $m_{\\pi}/m_{\\rho}\\simeq0.63$. Using th
e latter gauge configuration we measure correlation functions of the energ
y-momentum tensor\, from which we extract some transport coefficients. We
also measure the chiral condensate and topological charge and study their
temperature dependence.\n\nhttps://conference-indico.kek.jp/event/76/contr
ibutions/1523/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1523/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The sign problem and the Lefschetz thimbles in two dimensional Hub
bard model
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1524@conference-indico.kek.jp
DESCRIPTION:Speakers: Semeon Valgushev (Brookhaven National Laboratory)\nI
n the talk we discuss the sign problem and the possibility to alleviate it
with the help of methods related to Lefschetz thimbles in the space of co
mplexities field variables. In particular\, we consider two-dimensional Hu
bbard model at finite density. We analyze the model on the square lattice
combining semi-analytical study of saddle points and thimbles on a small l
attice and results of test Monte-Carlo simulations. We investigate differe
nt representations of the path integral and find a particular representati
on which supposedly leads to the presence of a single dominating thimble e
ven for large lattices. Finally\, we derive a novel non-Gaussian represent
ation of the four-fermion interaction term\, which also exhibits decreased
number of Lefschetz thimbles.\n\nhttps://conference-indico.kek.jp/event/7
6/contributions/1524/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1524/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Anomalous Casimir effect in axion electrodynamics
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1525@conference-indico.kek.jp
DESCRIPTION:Speakers: Zebin Qiu (University of Tokyo)\nThe Casimir effect
is relevant for QCD physics in many contexts such as a possible origin of
the dark energy\, an extra pressure in the hadron bag model etc. In this t
alk we delve into the Casimir effect in (3+1)-dimensional Maxwell-Chern-Si
mons (MCS) theory aka axion electrodynamics. It is known that two bodies w
ith reflection symmetry always have an attractive Casimir force\, but this
``no-go theorem'' has been challenged recently. We demonstrate that a spa
tially inhomogeneous topological $\\theta$ angle induces a repulsive Casim
ir force. This is a detectable effect in the topological insulator for whi
ch axion electrodynamics is the effective theory.\n\nhttps://conference-in
dico.kek.jp/event/76/contributions/1525/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1525/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quarkonium suppression in streaming quark-gluon plasma
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1526@conference-indico.kek.jp
DESCRIPTION:Speakers: Zhandos Moldabekov (Al Farabi Kazakh National Univer
sity)\nQuarkonium suppression in quark-gluon plasma has been investigated
since original work by Matsui and Satz [1]. This topic remains actual due
to the need of quark-gluon plasma diagnostics. In fact\, both quarkonium s
uppression in quark-gluon plasma and recombination during hadronisation re
main to be key open questions [2]. The bound state of quarkonium is theore
tically well investigated in the case of equilibrium quark-gluon plasma [3
]. However\, the experimentally produced quark-gluon plasmas is strongly n
on-equilibrium. Therefore\, in this work we present results for the quarko
nium suppression in streaming quark-gluon plasmas. For this propose we use
the concept of dynamical screening using the dielectric function of colli
sional quark-gluon plasma.\n\n[1] T. Matsui and H. Satz\, Physics Letters
178\, 416 (1986)\n\n[2] Jurgen Schukraft\, Nuclear Physics A 967\, 1 (2017
)\n\n[3] R. Rapp and X. Du\, Nuclear Physics A 967\, 216 (2017)\n\nhttps:/
/conference-indico.kek.jp/event/76/contributions/1526/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1526/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Logarithms in perturbation theory -- NNNLO pressure of cold and de
nse QCD
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1528@conference-indico.kek.jp
DESCRIPTION:Speakers: Matias Sappi (University of Helsinki)\nI will presen
t results on computing the pressure of cold and dense QCD matter to high l
oop orders in perturbation theory. Such high-order computations are made p
ossible by resumming contributions from the soft degrees of freedom. In pa
rticular\, I will cover the computation of the nonanalytic logarithmic ter
ms appearing at NNNLO for $T=0$\, both the leading logarithm based on a pa
per from 2018 (Phys.Rev.Lett. 121 (2018) no.20\, 202701) as well as a work
-in-progress computation for obtaining the subleading logarithmic term\, w
hich gets distinct contributions from both the resummed soft sector as wel
l as the hard sector.\n\nhttps://conference-indico.kek.jp/event/76/contrib
utions/1528/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1528/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Novel transport phenomena with chirality\, vorticity and magnetic
field
DTSTART;VALUE=DATE-TIME:20190625T053500Z
DTEND;VALUE=DATE-TIME:20190625T062000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1529@conference-indico.kek.jp
DESCRIPTION:Speakers: Jinfeng Liao (INDIANA UNIVERSITY)\nBy colliding heav
y ions at high energies\, physicists are able to "break up" nuclear partic
les like protons and neutrons and create a hot "subatomic soup"\, the quar
k-gluon plasma (QGP). In recent years\, there have been significant intere
sts and progress on the spin degrees of freedom in the QGP fluid. In parti
cular\, novel transport phenomena arise from the nontrivial interplay betw
een quark spin and chirality with extremely strong vorticity and magnetic
field in heavy ion collisions. In this talk\, a number of fascinating exam
ples will be briefly surveyed. The first is the global polarization of par
ticle spin from fluid rotation\, demonstrating "fluid spintronics" on the
subatomic scale. The second is the anomalous transport phenomenon known as
the Chiral Magnetic Effect (CME) that has been enthusiastically studied n
ot only in the "subatomic swirls" but also in Dirac and Well semimetals as
well as in atomic\, astrophysical and cosmological systems. The talk woul
d also give a more detailed discussion on the ongoing efforts to search fo
r the CME in heavy ion collisions. The pertinent progress in phenomenologi
cal modelings with the recently developed tool of Anomalous-Viscous Fluid
Dynamics (AVFD) framework will also be presented. We end this talk with an
outlook into the potential opportunity of discovery in the isobaric colli
sion experiment.\n\nhttps://conference-indico.kek.jp/event/76/contribution
s/1529/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1529/
END:VEVENT
BEGIN:VEVENT
SUMMARY:A more powerful thimble approach to lattice field theories
DTSTART;VALUE=DATE-TIME:20190626T054500Z
DTEND;VALUE=DATE-TIME:20190626T061000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1530@conference-indico.kek.jp
DESCRIPTION:Speakers: Francesco Di Renzo (University of Parma & INFN)\nLef
schetz thimbles regularisation of (lattice) field theories was put forward
as a possible solution to the sign problem. Despite elegant and conceptua
lly simple\, it has many subtleties. Two major ones have to do with most r
elevant issues: how can one efficiently implement importance sampling on t
himbles? how many thimbles should we take into account? As for the first q
uestion\, since a few years we have been working on algorithms in which on
e takes into account (complete) steepest ascent paths. We discuss improvem
ents we devised\, in particular with respect to the flow equation (which i
n this approach is the main building block). In the original formulation o
f thimble regularisation\, a single thimble dominance hypothesis was put f
orward: in the thermodynamic limit\, universality arguments could support
a scenario in which the dominant thimble (associated to the global minimum
of the action) captures the physical content of the field theory. By now
we know many counterexamples and we have been pursuing multi-thimble simul
ations ourselves. Still\, a single thimble regularisation would be the rea
l breakthrough. We report on ongoing work aiming at a substantial reductio
n of the number of thimbles to be taken into account (possibly being left
with one single thimble).\n\nhttps://conference-indico.kek.jp/event/76/con
tributions/1530/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1530/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Applicability of the complex Langevin method to QCD at finite dens
ity
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1531@conference-indico.kek.jp
DESCRIPTION:Speakers: Shoichiro Tsutsui (RIKEN)\nThe complex Langevin meth
od (CLM) is a promising approach to overcome the sign problem. Here we exa
mine its applicability to QCD at finite density on a $24^3 \\times 12$ lat
tice with four-flavor staggered fermions around the deconfinement phase t
ransition line in the $(T-\\mu)$-plane. While the CLM actually works at qu
ite large values of $\\mu$\, it fails in the confined phase\, which appear
s at lower $\\mu$. This is due to the singular drift problem as one can un
derstand through the generalized version of the Banks-Casher relation\, wh
ich relates the Dirac zero modes to the chiral condensate. This problem wa
s avoided in our previous work in the confined phase because of the chosen
small spatial volume.\n\nhttps://conference-indico.kek.jp/event/76/contri
butions/1531/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1531/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dyon in pure SU(2) Yang-Mills theory with a gauge-invariant mass t
oward confinement-deconfinement phase transition
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1532@conference-indico.kek.jp
DESCRIPTION:Speakers: Shogo Nishino (Chiba University)\nThe KvBLL instanto
ns (calorons) are extensively used to understand confinement-deconfinement
phase transition in the Yang-Mills theory at finite temperature. The KvBL
L instanton is a topological soliton solution of the self-dual equation of
the SU(2) Yang-Mills theory on $S^1\\times R^3$ space with instanton char
ge\, which consists of BPS dyons having both electric and magnetic charges
with non-trivial holonomy at spatial infinity. Recently\, we have found a
novel dyon solution as a non-BPS solution of (non self-dual) field equati
ons of a gauge-scalar model with the radially fixed scalar field in the ad
joint representation. This dyon solution of the gauge-scalar model is iden
tified with the topological field configuration of the Yang-Mills theory w
ith a gauge-invariant gluon mass term without scalar field\, which is rega
rded as the low-energy effective model of the Yang-Mills theory with mass
gap. This follows from the gauge-independent Higgs mechanism which does no
t rely on the spontaneous breaking of gauge symmetry. Our dyon has the non
-vanishing asymptotic value corresponding to the non-trivial holonomy at s
patial infinity to be comparable with the KvBLL dyon. Thus we can propose
another scenario for reproducing confinement-deconfinement phase transitio
n in the Yang-Mills theory at finite temperature based on our dyon solutio
n. In this poster we show the existence of such dyons and discuss the char
acteristic properties\, especially the asymptotic holonomy.\n\nhttps://con
ference-indico.kek.jp/event/76/contributions/1532/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1532/
END:VEVENT
BEGIN:VEVENT
SUMMARY:First study of $N_f=2+1+1$ lattice QCD with physical domain-wall q
uarks at finite temperatures (Cancelled)
DTSTART;VALUE=DATE-TIME:20190626T020500Z
DTEND;VALUE=DATE-TIME:20190626T023000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1533@conference-indico.kek.jp
DESCRIPTION:Speakers: Ting-Wai Chiu (National Taiwan University)\nUsing a
GPU cluster consisting of 25 units of Nvidia DGX-1 (each unit having 8*V10
0 interconnected by the NVLink)\, TWQCD collaboration has generated the fi
rst gauge ensembles of $N_f=2+1+1$ lattice QCD with physical domain-wall q
uarks on the $ L_x^3 \\times L_t = 64^3 \\times (6\,8\,10\,12\,16) $ latti
ces\, in the temperature range $ T \\simeq 200 - 550 $ MeV. The lattice sp
acing $a \\sim 0.064 $~fm ($ La > 4 $ fm\, and $ M_\\pi La > 3 $) and the
physical bare quark masses ($m_{u/d} a = 0.00125$\, $m_s a = 0.04$\, $m_c
a = 0.55$) are determined with the zero temperature gauge ensemble resulti
ng from the simulation of $N_f=2+1+1$ QCD on the $ 64^4 $ lattice. In this
talk\, I will outline the HMC simulation and the generation of the gauge
ensembles. Moreover\, I will present the first physical results (e.g.\, to
pological susceptibility) extracting from these $N_f = 2+1+1$ gauge ensemb
les with physical domain-wall quarks at finite temperatures.\n\nhttps://co
nference-indico.kek.jp/event/76/contributions/1533/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1533/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lattice with external fields and rotation
DTSTART;VALUE=DATE-TIME:20190626T000000Z
DTEND;VALUE=DATE-TIME:20190626T004500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1534@conference-indico.kek.jp
DESCRIPTION:Speakers: Arata Yamamoto (University of Tokyo)\nExtreme enviro
nments\, such as strong electromagnetic force and fast rotation\, induce i
nteresting quantum phenomena. They are relevant both for high energy exper
iments and for condensed matter experiments. From a theoretical point of v
iew\, we need reliable computational frameworks to investigate them. I wou
ld like to review such endeavors in lattice gauge theory.\n\nhttps://confe
rence-indico.kek.jp/event/76/contributions/1534/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1534/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Tensor network study of two dimensional complex $\\phi^{4}$ theory
at finite density
DTSTART;VALUE=DATE-TIME:20190626T074500Z
DTEND;VALUE=DATE-TIME:20190626T081000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1535@conference-indico.kek.jp
DESCRIPTION:Speakers: Ryo Sakai (Kanazawa University)\nWe study the comple
x $\\phi^{4}$ theory with finite chemical potential. To closely understand
nontrivial effects such as the Silver Blaze phenomenon\, experimental stu
dies on the lattice will give some knowledge\; however\, on account of the
finite chemical potential\, there is a sign problem in Monte Carlo simula
tions. In this study\, to overcome the problem\, the tensor renormalizatio
n group approach is employed\, and we give some numerical results surround
ing the phenomena in the finite density system.\n\nhttps://conference-indi
co.kek.jp/event/76/contributions/1535/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1535/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quantum dissipation of quarkonium in quark-gluon plasma: Lindblad
equation approach
DTSTART;VALUE=DATE-TIME:20190625T083000Z
DTEND;VALUE=DATE-TIME:20190625T085500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1536@conference-indico.kek.jp
DESCRIPTION:Speakers: Takahiro Miura (Osaka University)\nIn heavy ion coll
ision experiments\, quark-gluon plasma (QGP) is expected to be produced an
d its physical properties have been discussed. Survival probability of a q
uarkonium is sensitive to the Debye screening of color charges in QGP. The
dynamics of quarkonia can be described by master equation for the density
matrix in the open quantum system approach. In this approach\, the effect
of quantum dissipation can be discussed. In contrast\, this effect cannot
be described in a simple ''in-medium" Schroedinger equation approach. In
our study\, we derive the Lindblad master equation for the relative motion
of a quarkonium in QGP and solve it numerically. From this\, we analyze h
ow the quantum dissipation and the center-of-mass motion of the quarkonium
affect the relative motion between the heavy quark antiquark pair. Finall
y\, we present the phenomenological implication of the quarkonium dynamica
l evolution by solving the master equation in the Bjorken expanding QGP wh
ere the temperature decreases with time.\n\nhttps://conference-indico.kek.
jp/event/76/contributions/1536/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1536/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The sign problem in low dimensional QCD studied by using the path
optimization
DTSTART;VALUE=DATE-TIME:20190626T063500Z
DTEND;VALUE=DATE-TIME:20190626T070000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1537@conference-indico.kek.jp
DESCRIPTION:Speakers: Yuto Mori (Kyoto University)\nThe sign problem\, is
a serious obstacle to perform the Monte Carlo simulations of QCD with fini
te chemical potential\, is caused by the oscillation of the Boltzmann fact
or. To avoid this problem\, we have proposed the path optimization method.
In this method\, we optimize the integral path in complex plain to decrea
se the cancellation in integral. In this talk\, we explain the application
of this method to gauge theory\, and discuss the sign problem of low dime
nsional QCD.\n\nhttps://conference-indico.kek.jp/event/76/contributions/15
37/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1537/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Chiral kinetic theory in curved spacetime
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1538@conference-indico.kek.jp
DESCRIPTION:Speakers: Kazuya Mameda (RIKEN)\nMany-body systems with chiral
fermions exhibit anomalous transport phenomena originated from quantum an
omalies. Based on quantum field theory\, we derive the kinetic theory for
chiral fermions interacting with an external electromagnetic field and a b
ackground curved geometry. The resultant framework respects the covariance
under the U(1) gauge\, local Lorentz\, and diffeomorphic transformations.
It is particularly useful to study the gravitational or non-inertial effe
cts for chiral systems. As the first application\, we study the chiral dyn
amics in a rotating coordinate and clarify the roles of the Coriolis force
and spin-vorticity coupling in generating the chiral vortical effect (CVE
). We also show that the CVE is an intrinsic phenomenon of a rotating chir
al fluid\, and thus independent of observer's frame.\n\nhttps://conference
-indico.kek.jp/event/76/contributions/1538/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1538/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The interpolation approach to dense QCD and neutron-star phenomeno
logy
DTSTART;VALUE=DATE-TIME:20190624T020500Z
DTEND;VALUE=DATE-TIME:20190624T025000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1539@conference-indico.kek.jp
DESCRIPTION:Speakers: Tyler Gorda (University of Virginia)\nNeutron stars
(NSs) contain the densest observable matter in the universe. Within their
cores lies QCD matter compressed to multiple times the density of common n
uclei. Unfortunately\, this matter is too dense to be studied from first-p
rinciples nuclear-physics calculations\, and not dense enough to be studie
d using first-principles perturbative-QCD calculations. In this talk\, I w
ill detail a model-independent approach to bridge this unknown region of t
he equation of state (EOS) of NS matter. By using interpolating functions
to parametrize our ignorance of the EOS between the extremes of nuclear an
d quark matter\, and by demanding that a few robust astrophysical constrai
nts hold for each interpolated EOS\, we are able place bounds on the allow
ed region in pressure and energy density where the EOS of NS matter must l
ie. Furthermore\, we are also beginning to be able to draw conclusions abo
ut the physical properties of this matter\, and to address such questions
as whether NSs are dense enough to contain quark matter in their cores.\n\
nhttps://conference-indico.kek.jp/event/76/contributions/1539/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1539/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Current status and perspectives of complex Langevin calculations i
n finite density QCD
DTSTART;VALUE=DATE-TIME:20190624T000000Z
DTEND;VALUE=DATE-TIME:20190624T004500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1540@conference-indico.kek.jp
DESCRIPTION:Speakers: Jun Nishimura (KEK)\nMonte Carlo studies of finite d
ensity QCD is difficult due to the notorious sign problem. As a promising
approach that can avoid this problem\, the complex Langevin method has bee
n attracting attention. In particular\, a practical criterion for correct
convergence has been proposed\, and it is found to be satisfied in certain
parameter regions of finite density QCD. In this talk I will summarize ou
r results obtained so far and discuss what one can do using this method.\n
\nhttps://conference-indico.kek.jp/event/76/contributions/1540/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1540/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The chiral phase transition in (2+1)-flavor QCD
DTSTART;VALUE=DATE-TIME:20190626T023000Z
DTEND;VALUE=DATE-TIME:20190626T025500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1541@conference-indico.kek.jp
DESCRIPTION:Speakers: Frithjof Karsch (Universitaet Bielefeld)\nWe present
recent results on the pseudo-critical and critical behavior in (2+1)-flav
or QCD close to the chiral phase transition temperature.\n\nhttps://confer
ence-indico.kek.jp/event/76/contributions/1541/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1541/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Bulk quantities in nuclear collisions from Color Glass Condensate
and hybrid hydrodynamic simulations
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1542@conference-indico.kek.jp
DESCRIPTION:Speakers: Andre Veiga Giannini (Akita International University
and University of Sao Paulo)\nStarting from a running-coupling improved $
k_T$-factorized formula of the Color Glass Condensate (CGC) framework\, we
calculate bulk observables in several heavy-ion collision systems. This i
s done in two ways: first the particle distribution is calculated directly
as implied from the CGC model\, and then it is compared to the case where
it is instead used as initial conditions for a hybrid hydrodynamic simula
tion. In this way\, it it possible to assess the effects of hydrodynamic a
nd hadronic evolution by quantifying how much they change the results from
a pure initial state approach and\, therefore\, to what extent initial co
ndition models can be directly compared to experimental data. We find that
although entropy production in subsequent hydrodynamic evolution can incr
ease multiplicity by as much as 50%\, the centrality\, energy\, and system
size dependence of charged hadron multiplicity is only affected at the $\
\sim$5% level (disregarding a single overall - energy and system size inde
pendent - normalization) when compared to the pure initial state case. The
parameter-free prediction for these dependencies then gives reasonable ag
reement with experimental data whether or not hydrodynamic evolution is in
cluded. On the other hand\, our results are not compatible with the hypoth
esis that hydrodynamic evolution is present in large systems\, but not sma
ll systems like p-Pb. Moreover\, we find that hydrodynamic evolution signi
ficantly changes the distribution of momentum\, so that observables such a
s mean transverse momentum are very different from the initial particle pr
oduction\, and much closer to measured data. Lastly\, we point out that th
e onset of a hydrodynamic phase in heavy-ion collisions\, along with visco
us effects\, could\, perhaps\, be further investigated by studying the cen
trality dependence of ratio of the mean $p_T$ across different collision s
ystems with similar collision energy.\n\nhttps://conference-indico.kek.jp/
event/76/contributions/1542/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1542/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Topological susceptibility of two-color QCD at low temperature and
high density
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1543@conference-indico.kek.jp
DESCRIPTION:Speakers: Etsuko Itou (Keio University)\nWe study the chemical
potential $(\\mu)$ dependence of the topological susceptibility with two-
color two-flavor QCD. We find that at temperature $T \\sim T_c/2$\, where
Tc denotes the critical temperature at zero chemical potential\, the topol
ogical susceptibility is almost constant until $\\mu/m_{PS}=1.6$\, while a
t $T \\sim T_c$\, it decreases significantly from the $\\mu=0$ value in a
high $\\mu$ regime. In this work\, we perform the simulation for $\\mu/T \
\le 16$\, which covers even the low temperature and the high chemical pote
ntial regime. In this regime\, we introduce a diquark source term\, which
is characterized by $j$\, into the action. We also show our results for th
e phase diagram in a low temperature regime $(T \\sim T_c/2)$\, which is o
btained after taking the $j \\to 0$ limit of physical observable.\n\nhttps
://conference-indico.kek.jp/event/76/contributions/1543/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1543/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Partial deconfinement
DTSTART;VALUE=DATE-TIME:20190624T071500Z
DTEND;VALUE=DATE-TIME:20190624T080000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1544@conference-indico.kek.jp
DESCRIPTION:Speakers: Goro Ishiki (University of Tsukuba)\nWe discuss a "p
artially deconfined phase" in SU(N) gauge theories. This phase is in betwe
en the confined and deconfined phases and is defined such that SU(M) in SU
(N) (M \n\nhttps://conference-indico.kek.jp/event/76/contributions/1544/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1544/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Heavy quark spectral and transport properties from lattice QCD
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1545@conference-indico.kek.jp
DESCRIPTION:Speakers: Olaf Kaczmarek (University of Bielefeld)\nWe will pr
esent recent results on thermal modifications of heavy quark spectral func
tions based on continuum extrapolated correlation functions in pure SU(3)
plasma and discuss constraints for the heavy quark diffusion coefficients.
Using the gradient flow technique for the color-electric field correlator
in quenched as well as full QCD we will discuss the effects of dynamical
fermions on the heavy quark momentum diffusion coefficient and provide fir
st estimates on the thermal quarkonium mass shift of heavy quarks in the t
hermal medium.\n\nhttps://conference-indico.kek.jp/event/76/contributions/
1545/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1545/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Partial deconfinement
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1546@conference-indico.kek.jp
DESCRIPTION:Speakers: Hiromasa Watanabe (University of Tsukuba)\nWe argue
the existence of "partially deconfined phase" in some SU(N) gauge theories
\, that is in between the confined and deconfined phases. We characterize
this phase in terms of the Polyakov line phases and study examples of theo
ries in which the partially deconfined phase exists. We find that this pha
se is closely related to the Gross-Witten-Wadia phase transition. The part
ially deconfined phase is conjectured to be the counterpart of the small b
lack hole phase in the context of the gauge/string duality. We also discus
s possible applications in this context.\n\nhttps://conference-indico.kek.
jp/event/76/contributions/1546/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1546/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Schwinger-Keldysh formalism for Lattice Gauge Theories
DTSTART;VALUE=DATE-TIME:20190626T081000Z
DTEND;VALUE=DATE-TIME:20190626T083500Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1547@conference-indico.kek.jp
DESCRIPTION:Speakers: Hiroki Hoshina (The Univ. of Tokyo\, Komaba)\nIt is
important to compute transport coefficients in QCD at finite temperature a
nd density. When the imaginary-time formalism of Lattice QCD is used\, the
spectral functions have to be reconstructed by supplementing certain Ansa
tze for correlation functions on the lattice. On the other hand\, real-tim
e Green's functions can be obtained directly in the Schwinger-Keldysh (SK)
formalism. But the SK formalism has not been constructed so far for QCD n
on-perturbatively. In this work we formulate the SK formalism for Lattice
QCD by constructing the transfer matrix in the direction of real time for
gauge link field and Wilson fermion. We examine the spectral functions and
other real-time Green's functions in weak gauge-coupling limit. We also o
btain the Kubo formulae in this framework as a summation of the real-time
Green's functions on the closed time path.\n\nhttps://conference-indico.ke
k.jp/event/76/contributions/1547/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1547/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Correlations and probability distributions in high-energy nuclear
collisions
DTSTART;VALUE=DATE-TIME:20190625T004500Z
DTEND;VALUE=DATE-TIME:20190625T013000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1548@conference-indico.kek.jp
DESCRIPTION:Speakers: Adam Bzdak (AGH University of Science and Technology
)\nI will discuss the present efforts to probe the QCD phase diagram with
fluctuations and multi-particle correlations.\n\nhttps://conference-indico
.kek.jp/event/76/contributions/1548/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 134
URL:https://conference-indico.kek.jp/event/76/contributions/1548/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Extracting equation of state from neutron star observation using m
achine learning
DTSTART;VALUE=DATE-TIME:20190624T080000Z
DTEND;VALUE=DATE-TIME:20190624T082000Z
DTSTAMP;VALUE=DATE-TIME:20211204T204017Z
UID:indico-contribution-76-1549@conference-indico.kek.jp
DESCRIPTION:Speakers: Yuki Fujimoto (The University of Tokyo)\nFirst-princ
iples evaluation of the dense matter equation of state is one of the longs
tanding problems in QCD. Owing to the advances in neutron star observation
s in last decade\, it is now possible to evaluate the equation of state fr
om the observational data. As it circumvent the problems that are inherent
in the theory\, it may put significant constraint on the theory. Here we
discuss a novel method of machine learning to deduce the equation of state
from a set of mass-radius observational data\, which is alternative to th
e Bayesian analysis based on different principle. Using test data (mock ob
servational data) we confirm that the equation of state is correctly recon
structed and this method works well. We use state of the art observational
data of mass-radius measured from neutron star X-ray radiations as an inp
ut\, and estimate the equation of state. We confirm that the speed of soun
d calculated from the equation of state is surpassing the conformal limit
(1/3 of speed of light) as expected earlier. Our results are consistent wi
th extrapolation from the conventional nuclear models and the experimental
bound on the tidal deformability inferred from gravitational wave observa
tion. \n\n[1] Y. Fujimoto\, K. Fukushima\, K. Murase\, Phys. Rev. D 98\, 0
23019 (2018).\n\n[2] Y. Fujimoto\, K. Fukushima\, K. Murase\, arXiv:1903.0
3400 [nucl-th].\n\nhttps://conference-indico.kek.jp/event/76/contributions
/1549/
LOCATION:Bunkyo School Building\, Tokyo Campus\, University of Tsukuba 122
URL:https://conference-indico.kek.jp/event/76/contributions/1549/
END:VEVENT
END:VCALENDAR