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BEGIN:VEVENT
SUMMARY:Scattering Amplitudes from Geometries at Infinity
DTSTART:20191205T003000Z
DTEND:20191205T011000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1586@conference-indico.kek.jp
DESCRIPTION:Speakers: Song He\n\nhttps://conference-indico.kek.jp/event/80
/contributions/1586/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1586/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Decoding the Path Integral: Resurgence and Non-Perturbative Physic
s
DTSTART:20191203T073000Z
DTEND:20191203T083000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1550@conference-indico.kek.jp
DESCRIPTION:Speakers: Gerald Dunne\n\nThere are several important conceptu
al and computational questions concerning the Minkowski space path integra
l\, which have recently been approached from a new perspective motivated b
y "resurgent asymptotics"\, which is a novel mathematical formalism that s
eeks to unify perturbative and non-perturbative physics. In this general t
alk\, I will introduce the \nbasic ideas\, report on some examples in quan
tum mechanics and quantum field theory\, and discuss future prospects.\n\n
https://conference-indico.kek.jp/event/80/contributions/1550/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1550/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Hyperbolic Field Space and Swampland Conjecture for DBI Scalar
DTSTART:20191205T043000Z
DTEND:20191205T044500Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1551@conference-indico.kek.jp
DESCRIPTION:Speakers: Yun-Long Zhang\n\nWe study a model of two scalar fie
lds with a hyperbolic field space and show that it reduces to a single-fie
ld Dirac-Born-Infeld (DBI) model in the limit where the field space become
s infinitely curved. We apply the de Sitter swampland conjecture to the tw
o-field model and take the same limit. It is shown that in the limit\, all
quantities appearing in the swampland conjecture remain well-defined with
in the single-field DBI model. Based on a consistency argument\, we then s
peculate that the condition derived in this way can be considered as the d
e Sitter swampland conjecture for a DBI scalar field by its own. We also p
ropose an extension of the de Sitter swampland conjecture to the P(X) theo
ries with more general scalar field. [arXiv: 1905.10950]\n\nhttps://confer
ence-indico.kek.jp/event/80/contributions/1551/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1551/
END:VEVENT
BEGIN:VEVENT
SUMMARY:From 3d dualities to hadron physics
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1552@conference-indico.kek.jp
DESCRIPTION:Speakers: Naoto Kan\n\nWhen one of the space-time dimension is
compactified on the circle\, the QCD exhibits the chiral phase transition
at some critical radius. When we further turn on a background theta term
which depends on the compactified coordinate\, a topological ordered phase
appears at low energy via the winding of the theta. We discuss what kind
of theories can describe the physics near the critical point by requiring
the matching of topological field theories in the infrared. As one of the
possibilities\, we propose a scenario where the rho and omega mesons form
a U(Nf) gauge theory near the critical point. In the phase where the chira
l symmetry is restored\, they become the dual gauge boson of the gluon rel
ated by the level-rank duality between the three dimensional gauge theorie
s.\n\nhttps://conference-indico.kek.jp/event/80/contributions/1552/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1552/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Wavefunctions and Yukawa couplings on Resolutions of C^N/Z_N Orbif
olds
DTSTART:20191204T082000Z
DTEND:20191204T083500Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1553@conference-indico.kek.jp
DESCRIPTION:Speakers: Hajime Otsuka\n\nWe propose matter wavefunctions on
resolutions of C^N/Z_N singularities with magnetic fluxes. In this talk\,
we first discuss the resolution of magnetized T^2/Z_N orbifold models. In
the blow-down limit of T^2/Z_N orbifolds\, the obtained wavefunctions of c
hiral zero-modes result in those on the magnetized T^2/Z_N orbifold models
\, but only the wavefunctions of Z_N-invariant zero-modes receive the blow
-up effects around fixed points of T^2/Z_N orbifolds. Such blowup effects
change the selection rules and Yukawa couplings among the chiral zero-mode
s as well as the modular symmetry\, in contrast to those on the magnetized
T^2/Z_N orbifold models. We also discuss the matter wavefunctions on reso
lutions of K3 orbifolds.\n\nhttps://conference-indico.kek.jp/event/80/cont
ributions/1553/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1553/
END:VEVENT
BEGIN:VEVENT
SUMMARY:String Geometry Phenomenology
DTSTART:20191204T083500Z
DTEND:20191204T085000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1554@conference-indico.kek.jp
DESCRIPTION:Speakers: Matsuo Sato\n\nString geometry theory is one of cand
idates of the non-perturbative formulation of string theory. In order to d
erive low-energy phenomena\, we first need to clarify how supergravity bac
kground fields\, which represent the space-time and the internal space\, a
re described in string geometry theory. In this presentation\, we show tha
t arbitrary configurations of the heterotic supergravity background fields
are embedded in configurations of fields of string geometry theory. Espec
ially\, the configurations of string geometry satisfy equations of motions
of string geometry theory if the embedded supergravity backgrounds satisf
y the equations of motions of the heterotic supergravity. We can obtain th
e perturbative heterotic string theory on the flat space-time if we take t
he Newtonian limit around the configuration of string geometry correspondi
ng to the flat space-time. Thus\, we expect that we can also obtain the pe
rturbative heterotic string theory on the supergravity backgrounds if we t
ake the Newtonian limit around the configurations of string geometry corre
sponding to the supergravity backgrounds.\n\nhttps://conference-indico.kek
.jp/event/80/contributions/1554/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1554/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Complex Langevin simulation of the Lorentzian type IIB matrix mode
l
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1555@conference-indico.kek.jp
DESCRIPTION:Speakers: Mitsuaki HIRASAWA (SOKENDAI)\n\nThe type IIB matrix
model has been studied as a candidate of non-perturbative formulation of s
uperstring theory. In particular\, by Monte Carlo simulation of the Lorent
zian type IIB matrix model\, (3+1)-dimensional expanding space-time was sh
own to emerge dynamically. With its detailed analysis\, we found that the
emergent 3-dimensional space is essentially described by the Pauli matrice
s\, we call this structure as the Pauli-matrix structure. In fact\, the Mo
nte Carlo simulation of the Lorentzian type IIB matrix model has the sign
problem. Therefore\, we had used an approximation to avoid the sign proble
m in the previous works. However\, there is a subtlety in the approximatio
n\, and it might cause the Pauli-matrix structure. In this work\, we gener
alize the model by introducing two parameters which are related to the Wic
k rotation on the world sheet and in the target space. We perform the comp
lex Langevin simulation of the generalized model to overcome the sign prob
lem. As a result\, we can see a deviation from the Pauli-matrix structure
as we approach to the original model without losing the expanding behavior
.\n\nhttps://conference-indico.kek.jp/event/80/contributions/1555/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1555/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Unitary matrix model with the logarithmic potential
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1556@conference-indico.kek.jp
DESCRIPTION:Speakers: Hitomi TASHIRO (SOKENDAI)\n\nWe study the unitary on
e-matrix model with the logarithmic potential. It has been known that a he
rmitian one-matrix model with a logarithmic potential yields the prepotent
ial of 4d N=2 SU(2) SUSY gauge theory as its large-N free energy. We give
a rigorous proof that the unitary matrix model with the potential of the s
ame form as the hermitian matrix model for 4d N=2 Nf=2 SU(2) SUSY gauge th
eory yields the identical prepotential of it\, although the parameter iden
tifications of each model are slightly different. This result has been ant
icipated by Itoyama\, Oota\, and Yano.\n\nhttps://conference-indico.kek.jp
/event/80/contributions/1556/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1556/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Tricritical point and non-equilibrium phase transition in gauge gr
avity duality
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1557@conference-indico.kek.jp
DESCRIPTION:Speakers: Masataka Matsumoto\n\nWe study the phase structure a
ssociated with the chiral symmetry in the D3-D7 model. We find the non-equ
ilibrium phase transition for massless quarks in the presence of a constan
t current and a magnetic field. This non-equilibrium phase transition is r
elated to the chiral symmetry breaking. We also discover the tricritical p
oint in the phase diagram.\n\nhttps://conference-indico.kek.jp/event/80/co
ntributions/1557/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1557/
END:VEVENT
BEGIN:VEVENT
SUMMARY:S-duality for gauged Argyres-Douglas theories
DTSTART:20191205T023000Z
DTEND:20191205T031000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1558@conference-indico.kek.jp
DESCRIPTION:Speakers: Takahiro Nishinaka\n\nhttps://conference-indico.kek.
jp/event/80/contributions/1558/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1558/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Chiral vortical conductivity across a topological phase transition
from holography
DTSTART:20191204T070000Z
DTEND:20191204T071500Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1559@conference-indico.kek.jp
DESCRIPTION:Speakers: Xuanting Ji\n\nWe study the chiral vortical conducti
vity in a holographic Weyl semimetal model\, which describes a topological
phase transition from the strongly coupled topologically nontrivial phase
to a trivial phase. We focus on the temperature dependence of the chiral
vortical conductivity where the mixed gauge-gravitational anomaly plays a
crucial role. After a proper renormalization of the chiral vortical conduc
tivity by the anomalous Hall conductivity and temperature squared\, we fin
d that at low temperature in both the Weyl semimetal phase and the quantum
critical region this renormalized ratio stays as universal constants. Mor
e intriguingly\, this ratio in the quantum critical region depends only on
the emergent Lifshitz scaling exponent at the quantum critical point.\n\n
https://conference-indico.kek.jp/event/80/contributions/1559/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1559/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nuclear states and spectra in holographic QCD
DTSTART:20191204T071500Z
DTEND:20191204T073000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1560@conference-indico.kek.jp
DESCRIPTION:Speakers: Yoshinori Matsuo\n\nA new method to study nuclear ph
ysics via holographic QCD is proposed. Multiple baryons in the Sakai-Sugim
oto background are described by a matrix model which is a low energy effec
tive theory of D-branes of the baryon vertices. We study the quantum mecha
nics of the matrix model and calculate the eigenstates of the Hamiltonian.
The obtained states are found to coincide with known nuclear and baryonic
states\, and have appropriate statistics and charges. Calculated spectra
of the baryon/nucleus for small baryon numbers show good agreement with ex
perimental data. The model partially explains even the magic numbers of li
ght nuclei\, N=2\, 8 and 20.\n\nhttps://conference-indico.kek.jp/event/80/
contributions/1560/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1560/
END:VEVENT
BEGIN:VEVENT
SUMMARY:2d 't Hooft anomaly\, orbifolding\, and boundary states
DTSTART:20191204T075000Z
DTEND:20191204T080500Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1561@conference-indico.kek.jp
DESCRIPTION:Speakers: Ken Kikuchi\n\nWe study anomalies for a discrete int
ernal global symmetry $G$ in two-dimensional conformal field theories base
d on twisted torus partition functions. The 't Hooft anomaly of $G$ can be
seen from the noncommutativity of two symmetry lines inserted along the n
ontrivial circles of two-torus and we propose a criterion to detect the 't
Hooft anomaly\, which agrees with the truncated modular $S$-matrix approa
ch as well as the cohomology classification. The obstruction for orbifoldi
ng has been recently interpreted as a mixed anomaly between $G$ and large
diffeomorphisms. We clarify the relations among 't Hooft anomaly-free\, or
bifolding condition and invariant boundary state condition\, focusing on W
ess-Zumino-Witten models.\n\nhttps://conference-indico.kek.jp/event/80/con
tributions/1561/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1561/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Does Boundary Distinguish Complexities?
DTSTART:20191204T080500Z
DTEND:20191204T082000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1562@conference-indico.kek.jp
DESCRIPTION:Speakers: Yoshiki Sato\n\nRecently\, Chapman et al. argued tha
t holographic complexities for defects distinguish action from volume. Mot
ivated by their work\, we study complexity of quantum states in conformal
field theory with boundary. In generic two-dimensional BCFT\, we work on t
he path-integral optimization which gives one of field-theoretic definitio
ns for the complexity. We also perform holographic computations of the com
plexity in Takayanagi's AdS/BCFT model following by the "complexity = volu
me" conjecture and "complexity = action" conjecture. We find that incremen
ts of the complexity due to the boundary show the same divergent structure
s in these models except for the CA complexity in the AdS3/BCFT2 model as
the argument by Chapman et al. Thus\, we conclude that boundary does not d
istinguish the complexities in general.\n\nhttps://conference-indico.kek.j
p/event/80/contributions/1562/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1562/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Evidence for Weak-Coupling Holography from the Gauge/Gravity Corre
spondence for Dp-branes
DTSTART:20191203T060000Z
DTEND:20191203T061500Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1563@conference-indico.kek.jp
DESCRIPTION:Speakers: Yasuhiro Sekino\n\nGauge/gravity correspondence is r
egarded as a powerful tool for the study strongly-coupled quantum systems\
, but its proof is not available. An unresolved issue that should be close
ly related to the proof is what kind of correspondence exists\, if any\, w
hen gauge theory is weakly coupled. We report progress about this limit fo
r the case associated with D$p$-branes ($0\\le p\\le 4$)\, namely\, the du
ality between the $(p+1)$-dimensional maximally supersymmetric Yang-Mills
theory and superstring theory on the near-horizon limit of the D$p$-brane
solution. It has been suggested by supergravity analysis that the two-poin
t functions of certain operators in gauge theory obey power law with the p
ower different from the free-field value for $p\\neq 3$. We show for the f
irst time that the free-field result can be reproduced by superstring theo
ry on the strongly curved background. The operator that we consider is of
the form ${\\rm Tr}(Z^J)$\, where $Z$ is a complex combination of two scal
ar fields. We assume that the corresponding string has the worldsheet spat
ial direction discretized into $J$ bits\, and use the fact that these bits
become independent particles when string tension is zero.\n\nhttps://conf
erence-indico.kek.jp/event/80/contributions/1563/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1563/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Supersymmetric non-abelian D-brane equations from open pure spinor
superstring
DTSTART:20191203T061500Z
DTEND:20191203T063000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1564@conference-indico.kek.jp
DESCRIPTION:Speakers: Sota Hanazawa\n\nWe have examined the BRS invariance
of the open pure spinor superstring to derive equations of motion for a s
upersymmetric D$p$-brane\, which should be induced from the DBI action and
the Wess-Zumino action. These equations are consistent with the dimension
al reduction of equations for a supersymmetric D9-brane obtained by Berkov
its and Pershin. They also analyzed non-abelian backgrounds up to quadrati
c order in ``boundary fermions''\, which are world-volume fermions on D-br
anes and represent the Chan-Paton factors for open strings. In this talk\,
we will extend previous results to supersymmetric non-abelian D-brane equ
ations including all boundary fermions.\n\nhttps://conference-indico.kek.j
p/event/80/contributions/1564/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1564/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Renormalon in compactified spacetime and relation with bion
DTSTART:20191204T063000Z
DTEND:20191204T064500Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1565@conference-indico.kek.jp
DESCRIPTION:Speakers: Hiromasa Takaura\n\nRecently\, it was conjectured th
at the perturbative ambiguity known as the renormalon is canceled against
the nonperturbative semiclassical object called bion. This conjecture expe
cts this kind of cancellation in the circle compactified spacetime\, in wh
ich the bion solution is found\, as a premise. To examine this conjecture\
, we study the renormalon structure in the compactified spacetime under th
e assumption typically realized in large N theories\, and find that renorm
alon is significantly affected by the compactification. This seems to be a
gainst naive expectation of recent bion scenario.\n\nhttps://conference-in
dico.kek.jp/event/80/contributions/1565/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1565/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Double field inflation of generalized dilaton-axion models with a
new Fayet-Iliopoulos (FI) term
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1566@conference-indico.kek.jp
DESCRIPTION:Speakers: Ping Kwan Man\n\nIn this talk\, we are going to talk
about inflation dynamics by KKLT-like model modified by a new Fayet-iliop
oulos (FI) term. KKLT model\, motivated by superstring theory\, gives the
AdS vacuum\, which is phenomenologically forbidden. Although previous stud
ies solved this problem by adding a D3 bar or D7 contribution to uplift th
e vacuum to zero\, it is not flat enough to provide the initial slow-roll
environment. In this talk\, we show that a new FI term without R gauged sy
mmetry can provide this. We also show the parameters of dS vacuum and infl
ation dynamics.\n\nhttps://conference-indico.kek.jp/event/80/contributions
/1566/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1566/
END:VEVENT
BEGIN:VEVENT
SUMMARY:How information geometry is encoded in bulk geometry
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1567@conference-indico.kek.jp
DESCRIPTION:Speakers: Kazushi Yamashiro\n\nWe study how information geomet
ry is described by bulk geometry in the gauge/gravity correspondence. We c
onsider a quantum information metric that measures the distance between th
e ground states of a CFT and a theory obtained by perturbing the CFT. Usin
g the GKP-Witten relation\, we find a universal formula that expresses the
quantum information metric by a geometrical quantity in a back-reacted bu
lk geometry.\n\nhttps://conference-indico.kek.jp/event/80/contributions/15
67/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1567/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Complex Langevin Simulation of 2D U(1) gauge theory with a theta t
erm
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1568@conference-indico.kek.jp
DESCRIPTION:Speakers: Akira Matsumoto\n\nThe Monte Carlo simulation of gau
ge theories with a theta term is quite difficult due to the sign problem.
The complex Langevin method is a promising approach to solve this problem.
We applied this method to the 2D U(1) gauge theory\, which is analyticall
y solvable\, in order to check the validity of the method. We were able to
reproduce the exact results in the whole region of -pi \n\nhttps://confer
ence-indico.kek.jp/event/80/contributions/1568/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1568/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Superconformal index and supersymmetry enhancement of S-fold theor
ies
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1569@conference-indico.kek.jp
DESCRIPTION:Speakers: Reona Arai\n\nRecently concrete models of 4d N=3 sup
erconformal field theories called S-fold theories are constructed by Garci
a-Etxebarria and Regalado. Although it is difficult to study these theorie
s due to the lack of the Lagrangian description and the strong coupling\,
it is expected that there is a non-trivial supersymmetry enhancement for r
ank one and two theories by Aharony and Tachikawa. In this poster\, we eva
luate the first non-trivial finite rank corrections to the superconformal
index of these theories by using AdS/CFT correspondence and check the supe
rsymmetry enhancement. To evaluate the index in finite rank\, we mainly fo
cus on the D3-branes wrapping a non-trivial three cycle on AdS side interp
reted as Pfaffian-like operators on CFT side. We see that our results agre
e with the results expected from the supersymmetry enhancement.\n\nhttps:/
/conference-indico.kek.jp/event/80/contributions/1569/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1569/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Cubic vertices for massless higher spin gauge fields in AdS spaces
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1584@conference-indico.kek.jp
DESCRIPTION:Speakers: Haruya Suzuki\n\nHigher spin (HS) gauge theory may b
e regarded as a generalization of the electromagnetic theory of a spin-1 p
hoton and the linearized gravity of a spin-2 graviton. String theory which
has infinitely many massive modes may be seen as a broken phase of the HS
gauge symmetry. The higher spin gauge theory is expected to gain a deeper
understanding of AdS/CFT duality. To gain more insight into the duality\,
It is necessary to understand quantum spectrum of string in AdS. This is
not achieved yet\, because the actin of higher spin theory is not complete
ly known in AdS. In this presentation\, we consider cubic interaction vert
ices of bosonic HS fields with spin s1\, s2 and s3\, in flat and AdS space
s.\n\nhttps://conference-indico.kek.jp/event/80/contributions/1584/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1584/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Swampland Phenomenology
DTSTART:20191206T003000Z
DTEND:20191206T011000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1585@conference-indico.kek.jp
DESCRIPTION:Speakers: Masahito Yamazaki\n\nhttps://conference-indico.kek.j
p/event/80/contributions/1585/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1585/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dynamics of Revolving D-Branes at Short Distances
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1570@conference-indico.kek.jp
DESCRIPTION:Speakers: Hikaru Ohta\n\nWe study the behavior of the effectiv
e potential between revolving Dp-branes at all ranges of the distance $r$\
, interpolating regions on which r is larger and smaller than the string l
ength. Since the one-loop open string amplitude cannot be calculated exact
ly\, we instead employ an efficient method of partial modular transformati
on. The method is to perform the modular transformation partially in the m
oduli parameter and rewrite the amplitude into a sum of contributions from
both of the open and closed string massless modes. It is nevertheless fre
e from the double counting and can approximate the open string amplitudes
with less than 3% accuracy. From the D-brane effective field theory point
of view\, this amounts to calculating the one-loop threshold corrections o
f infinitely many open string massive modes. We show that threshold correc
tions to the ω^2r^2 term of the moduli field r cancel among them\, where
ω is the angular frequency of the revolution and sets the scale of supers
ymmetry breaking. This cancellation suggests a possibility to solve the hi
erarchy problem of the Higgs mass in high scale supersymmetry breaking mod
els.\n\nhttps://conference-indico.kek.jp/event/80/contributions/1570/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1570/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Finite N corrections to the superconformal index of toric quiver g
auge theories
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1571@conference-indico.kek.jp
DESCRIPTION:Speakers: Tatsuya Mori\n\nWe study the finite N AdS/CFT corres
pondence between the Type IIB string theories on AdS5×SE5 and quiver gaug
e theories\, where SE5 is a five-dimensional Sasaki-Einstein manifold. Our
assumption is that D3-branes wrapping on the three-cycles in the internal
space give the finite N corrections to the index. We calculate the index
of wrapped D3-branes and get the non-trivial coincidence for leading finit
e N corrections in comparison with the localization results from the gauge
theory.\n\nhttps://conference-indico.kek.jp/event/80/contributions/1571/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1571/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Instability of Higgs Vacuum via String Cloud
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1572@conference-indico.kek.jp
DESCRIPTION:Speakers: Issei Koga\n\nWe study the instability of the Higgs
vacuum caused by a cloud of strings. By the catalysis\, the decay rate of
the vacuum is highly enhanced and when the energy density of the cloud is
larger than the critical value\, the semi-classical vacuum decay occurs. W
e also discuss the relation between the cloud of strings and observational
constraints on cosmic strings in terms of the catalysis\, providing const
raints on the parameters of the Higgs potential.\n\nhttps://conference-ind
ico.kek.jp/event/80/contributions/1572/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1572/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Higher spin symmetry in the IIB matrix model with the operator int
erpretation
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1573@conference-indico.kek.jp
DESCRIPTION:Speakers: Katsuta Sakai\n\nWe study the IIB matrix model in an
interpretation where the matrices are differential operators defined on c
urved spacetimes. In this interpretation\, coefficients of higher derivati
ve operators formally appear to be massless higher spin fields. With my po
ster\, we discuss whether the unitary symmetry of the matrices includes ap
propriate higher spin gauge symmetries. We find that the additional auxili
ary fields need to be introduced in order to formulate the manifest symmet
ries\, with which potentially unstable components are eliminated. As a res
ult\, we observe that the independent physical DoF are the transverse comp
onents of that symmetric field\, and that the theory describes the corresp
onding higher spin field. We also find that the field is not the Fronsdal
field\, rather the generalization of curvature.\n\nhttps://conference-indi
co.kek.jp/event/80/contributions/1573/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1573/
END:VEVENT
BEGIN:VEVENT
SUMMARY:D3-brane analysis for the superconformal index in orbifold quiver
gauge theories
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1574@conference-indico.kek.jp
DESCRIPTION:Speakers: Shota Fujiwara\n\nWe study the orbifold type of AdS5
/CFT4 correspondence for ﬁnite N by using the superconformal index. Espe
cially\, we calculate the ﬁnite N corrections to the superconformal inde
x from the dual gravity theory. Our method is based on the assumption that
D3-branes wrapped around three-cycles in the internal space reproduce the
ﬁnite N corrections. As a result we find this approach actually gives t
he known superconformal index (localization result) for leading correction
s for orbifold quiver gauge theories.\n\nhttps://conference-indico.kek.jp/
event/80/contributions/1574/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1574/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quantum Gravity and Naturalness
DTSTART:20191203T013000Z
DTEND:20191203T021000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1577@conference-indico.kek.jp
DESCRIPTION:Speakers: Hikaru Kawai\n\nWe discuss the possibility that natu
ralness can be understood as an effect of quantum gravity. In particular\,
we will consider a mechanism by which the electroweak scale is naturally
obtained from the Planck scale.\n\nhttps://conference-indico.kek.jp/event/
80/contributions/1577/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1577/
END:VEVENT
BEGIN:VEVENT
SUMMARY:An Approach to Quantum Gravity -- Asymptotic Safety --
DTSTART:20191203T043000Z
DTEND:20191203T051000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1579@conference-indico.kek.jp
DESCRIPTION:Speakers: Nobuyoshi Ohta\n\nWe explain an approach to formulat
e quantum gravity within the framework of local quantum field theory using
functional renormalization group. called asymptotic safety. Starting how
the approach is formulated\, we intoduce the notion of critical surface an
d discuss its dimensionality. Several physical aspects of this approach ar
e also discussed including quantum effective action derived from renormali
zation group equation.\n\nhttps://conference-indico.kek.jp/event/80/contri
butions/1579/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1579/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Status of asymptotic safety in gravity-matter systems
DTSTART:20191203T023000Z
DTEND:20191203T031000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1580@conference-indico.kek.jp
DESCRIPTION:Speakers: Masatoshi Yamada\n\nAsymptotically safe quantum grav
ity is one of candidates for quantum gravity. It is essential that there e
xists a non-trivial fixed point for gravitational couplings. In this talk
we review the current status of the asymptotic safety scenario for gravity
-matter systems.\n\nhttps://conference-indico.kek.jp/event/80/contribution
s/1580/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1580/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Resurgence and Phase Transitions
DTSTART:20191204T013000Z
DTEND:20191204T021000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1581@conference-indico.kek.jp
DESCRIPTION:Speakers: Gerald Dunne\n\nResurgent asymptotics unifies pertur
bative and non-perturbative methods in quantum mechanics and quantum field
theory\, and gives a new perspective on phase transitions. I present an i
ntroduction to the basic ideas behind resurgence and several physical exam
ples of phase transitions that can be probed this way\, including the fini
te N approach to large N phase transitions. I also discuss new resurgent e
xtrapolation methods that can extend asymptotic expansions throughout the
complex plane.\n\nhttps://conference-indico.kek.jp/event/80/contributions/
1581/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1581/
END:VEVENT
BEGIN:VEVENT
SUMMARY:IR renormalon in a compactified spacetime: the case of the QCD(adj
.) on $R^3\\times S^1$
DTSTART:20191204T003000Z
DTEND:20191204T011000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1582@conference-indico.kek.jp
DESCRIPTION:Speakers: Hiroshi Suzuki\n\nAn interesting possibility that th
e ambiguity in perturbation theory caused by the IR renormalon is cancelle
d by the instability associated with a semi-classical object called bion h
as been suggested in the context of the resurgence program of asymptotical
ly-free quantum field theories. To reinforce this picture on the IR renorm
alon\, the understanding of the IR renormalon in a compactified space such
as $R^{D−1}\\times S^1$ seems to be a basic premise. In this talk\, I r
eport our recent analysis on the IR renormalon in the gluon condensate in
the $SU(N)$ QCD(adj.) on $R^3\\times S^1$ with the $Z_N$ twisted boundary
conditions. In the large $N$ limit within the so-called large $\\beta_0$ a
pproximation\, we find that the vacuum polarization of the W-boson\, which
acquires the twisted momentum from the boundary conditions\, gives rise t
o the renormalon ambiguity that is identical to that in the system in the
un-compactified space\, $R^4$. This situation is completely different from
that in the 2D $CP^{N-1}$ model on $R^1\\times S^1$ (the analyses on the
latter will be presented by Dr. Takaura and Mr. Morikawa).\n\nhttps://conf
erence-indico.kek.jp/event/80/contributions/1582/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1582/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Deep into the Amplituhedron
DTSTART:20191204T053000Z
DTEND:20191204T061000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1583@conference-indico.kek.jp
DESCRIPTION:Speakers: Jaroslav Trnka\n\nhttps://conference-indico.kek.jp/e
vent/80/contributions/1583/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1583/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sign problem and the tempered Lefschetz thimble method
DTSTART:20191204T043000Z
DTEND:20191204T051000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1587@conference-indico.kek.jp
DESCRIPTION:Speakers: Masafumi Fukuma\n\nThe tempered Lefschetz thimble me
thod (TLTM) [arXiv:1703.00861] is a parallel-tempering algorithm towards s
olving the numerical sign problem. It uses the flow time of the antiholomo
rphic gradient flow as a tempering parameter and is expected to tame both
the sign and multimodal problems simultaneously. In this talk\, after revi
ewing the TLTM\, we apply the method to various problems\, including the q
uantum Monte Carlo simulation of the Hubbard model away from half-filling
and the chiral random matrix models with finite temperature and finite che
mical potential.\n\nhttps://conference-indico.kek.jp/event/80/contribution
s/1587/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1587/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Anomaly matching in QCD thermal phase transition
DTSTART:20191206T013000Z
DTEND:20191206T021000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1588@conference-indico.kek.jp
DESCRIPTION:Speakers: Kazuya Yonekura\n\nI will talk about a nonperturbati
ve constraint on QCD thermal phase transition. First\, I discuss a rigorou
s constraint from 't Hooft anomaly matching when the quarks are massless a
nd we introduce an imaginary baryon chemical potential at the Roberge-Weis
s point. Then\, I discuss the reason why I think the constraint is also re
levant for the QCD phase transition without any imaginary chemical potenti
al and with realistic quark masses.\n\nhttps://conference-indico.kek.jp/ev
ent/80/contributions/1588/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1588/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Cancellation of one-loop corrections to scalar masses in Yang-Mill
s theory with flux compactification
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1589@conference-indico.kek.jp
DESCRIPTION:Speakers: Takuya Hirose\n\nWe calculate one-loop corrections t
o the mass for the zero mode of scalar field in a six-dimensional Yang-Mil
ls theory compactified on a torus with magnetic flux. It is shown that the
se corrections are exactly cancelled thanks to a shift symmetry under the
translation in extra spaces. This result is expected from the fact that th
e zero mode of scalar field is a Nambu-Goldstone boson of the translationa
l invariance in extra spaces.\n\nhttps://conference-indico.kek.jp/event/80
/contributions/1589/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1589/
END:VEVENT
BEGIN:VEVENT
SUMMARY:QCD phase diagram and the possibility of topological phases
DTSTART:20191205T013000Z
DTEND:20191205T021000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1590@conference-indico.kek.jp
DESCRIPTION:Speakers: Yoshimasa Hidaka\n\nI discuss possible phases of QCD
at finite temperature\, density and/or strong fields. In particular\, I d
iscuss the possibility of topological phases in dense QCD matter.\n\nhttps
://conference-indico.kek.jp/event/80/contributions/1590/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1590/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Application of the tensor renormalization group method to non-Abel
ian lattice gauge theories
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1591@conference-indico.kek.jp
DESCRIPTION:Speakers: Atis Yosprakob\n\nThe tensor renormalization group m
ethod is a powerful tool to study \nlattice models\, which works even with
models that have sign problem. \nHowever\, so far\, its application to ga
uge theory has been restricted the \nU(1) and SU(2) cases. In this work\,
we apply it to two-dimensional U(N) \ngauge theories which are exactly sol
vable. We are able to extract the \nlarge-N behaviors of the model such as
the Eguchi-Kawai reduction and \nthe Gross-Witten phase transition. We al
so study the model with a theta-\nterm\, which has the sign problem\, and
reproduce exact results.\n\nhttps://conference-indico.kek.jp/event/80/cont
ributions/1591/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1591/
END:VEVENT
BEGIN:VEVENT
SUMMARY:On UV-finiteness of supersymmetric gradient flow in N=1 SQCD
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1592@conference-indico.kek.jp
DESCRIPTION:Speakers: Mitsuyo Suzuki\n\nI will discuss perturbation theory
of supersymmetric gradient flow in 4D N = 1 SQCD. The perturbation theory
consists of a perturbative expansion of 4D SQCD and an iterative expansio
n of the flow equation. In order to prove UV-finiteness of flow theory\, i
t is necessary to calculate its correlation functions and to construct a d
+1-dimensional theory which reproduces the same perturbation series.\n\nht
tps://conference-indico.kek.jp/event/80/contributions/1592/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1592/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Asymptotic Freedom in de Sitter Space
DTSTART:20191206T023000Z
DTEND:20191206T031000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1593@conference-indico.kek.jp
DESCRIPTION:Speakers: Yoshihisa Kitazawa\n\nWe investigate infrared dynami
cs of four-dimensional Einstein gravity in de Sitter space. With the accel
erated expansion of the universe\, conformal zero modes accumulate at the
horizon. The inflaton reresent the characteristic scale of the zero mode d
istribution. Furthermore\, the introduction of an inflaton in the low ener
gy effective theory is necessary to preserve Lorentz symmetry. We observe
and postulate a duality between quantum effects in Einstein gravity and cl
assical evolutions in inflation/quintessence models. The duality implies t
he effective action of Einstein gravity can be constructed as inflation/qu
intessence models with manifest general covariance. We show that $g=G_N H^
2/\\pi$: the only dimensionless coupling of $H^2$ (Hubble parameter) and $
G_N$ (Newton's coupling) in Einstein gravity is screened by the infrared l
ogarithmic fluctuations of the conformal mode. We evaluate the one-loop $\
\beta$ function of $g$ with respect to the cosmic time $\\log Ht$ as $\\be
ta(g)=-(1/2)g^2$\, i.e.\, $g$ is asymptotically free toward future. We hav
e identified de Sitter entropy $1/g$ with von Neumann entropy of the confo
rmal zero modes. The former evolves according to the $\\beta$ function and
Gibbons-Hawking formula. The latter is found to increase by diffusion in
the stochastic process at the horizon in a consistent way. Our Universe is
located very close to the fixed point $g=0$ with a large entropy. We disc
uss possible physical implications of our results such as logarithmic deca
y of dark energy.\n\nhttps://conference-indico.kek.jp/event/80/contributio
ns/1593/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1593/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Power of ZN-twisted boundary condition ~Resurgence and Continuity~
DTSTART:20191204T023000Z
DTEND:20191204T031000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1594@conference-indico.kek.jp
DESCRIPTION:Speakers: Tatsuhiro Misumi\n\nQuantum field theories on the ci
rcle-compactified spacetime are quite worth\ninvestigating in terms of fin
ite-T physics\, resurgence theory and volume\nindependence. In particular\
, several evidences indicate that the\ncompactified theories with ZN-twist
ed boundary condition maintain the\nvacuum structure of the original uncom
pactified theory. We discuss this\nproperty\, called adiabatic continuity\
, and its implication on resurgence\ntheory by looking into a couple of th
eories including CP^{N-1} model\,\nSchwinger model\, flag sigma model\, an
d 4d QCD. The weapons we use in this\ntalk include semiclassical analysis\
, 't Hooft anomaly matching\, and lattice\nsimulations.\n\nhttps://confere
nce-indico.kek.jp/event/80/contributions/1594/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1594/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Catalytic Creation of Baby Bubble Universe with Small Positive Cos
mological Constant
DTSTART:20191203T054500Z
DTEND:20191203T060000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1595@conference-indico.kek.jp
DESCRIPTION:Speakers: Yutaka Ookouchi\n\nWe investigate the decay of metas
table de Sitter\, Minkowski and anti-de Sitter vacua catalyzed by a black
hole and a cloud of strings. We apply the method to the creation of the fo
ur dimensional bubble universe in the five dimensional anti-de Sitter spac
etime recently proposed by Banerjee\, Danielsson\, Dibitetto\, Giri and Sc
hillo. We study the bounce action for the creation and find that the bubbl
e with very small cosmological constant\, of order $\\Lambda^{(4)}/M^4_4 \
\sim 10^{-120}$\, is favored by the catalysis by assuming appropriate mass
scales of the black hole and the cloud of strings to reproduce the presen
t energy densities of matter and radiation in the bubble universe.\n\nhttp
s://conference-indico.kek.jp/event/80/contributions/1595/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1595/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Direct Calculation of Mutual Information of Distant Regions
DTSTART:20191205T050000Z
DTEND:20191205T051500Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1596@conference-indico.kek.jp
DESCRIPTION:Speakers: Noburo Shiba\n\nWe consider the (Renyi) mutual infor
mation\, I^(n) (A\,B)=S^(n)_A +S^(n)_B −S^(n)_ A∪B \, of distant compa
ct spatial regions A and B in the vacuum state of a free scalar field. The
distance r between A and B is much greater than their sizes R A\,B . It i
s known that I^(n)_(A\,B)∼C^(n)_AB ⟨0|ϕ(r)ϕ(0)|0⟩^2 . We obtain th
e direct expression of C^(n)_AB for arbitrary regions A and B. We perform
the analytical continuation of n and obtain the mutual information. The di
rect expression is useful for the numerical computation. By using the dire
ct expression\, we can compute directly I(A\,B) without computing S_A \,S_
B and S_A∪B respectively\, so it reduces significantly the amount of com
putation.\n\nhttps://conference-indico.kek.jp/event/80/contributions/1596/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1596/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Duality Invariance of Kahler potentials on Generalized Flag Manifo
lds from Diverse Quiver Gauge Theories
DTSTART:20191205T044500Z
DTEND:20191205T050000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1597@conference-indico.kek.jp
DESCRIPTION:Speakers: Keisuke Ohashi\n\nWe present a systematic constructi
on of K¨ahler potentials for various quiver gauge theories\, which give p
ure realizations of the general flag manifolds as target manifolds. There\
, for arbitrary gener- alized flag manifolds with arbitrary complex struct
ures\, we rediscover the K¨ahler potentials given in the basic theory by
Bando\, Kuramoto\, Maskawa and Uehara. In terms of these explicit forms\,
we confirm that all cluster mutations between different quiver gauge theor
ies always reproduce the same K¨ahler potential. Furthermore these constr
uctions and dualities are applied to Kahlerrian coset space G/H with all c
lassical groups G.\n\nhttps://conference-indico.kek.jp/event/80/contributi
ons/1597/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1597/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Topological order in the color-flavor locked phase of (3+1)-dimens
ional U(N) gauge-Higgs system
DTSTART:20191204T064500Z
DTEND:20191204T070000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1598@conference-indico.kek.jp
DESCRIPTION:Speakers: Ryo Yokokura\n\nWe study a (3+1)-dimensional U(N) ga
uge theory with N-flavor fundamental scalar fields\, whose color-flavor lo
cked (CFL) phase has topologically stable non-Abelian vortices. The U(1) c
harge of the scalar fields must be Nk+1 for some integer k in order for th
em to be in the representation of U(N) gauge group. This theory has a Z_{N
k+1} one-form symmetry\, and it is spontaneously broken in the CFL phase\,
i.e.\, the CFL phase is topologically ordered if k is not 0. We also find
that the world sheet of topologically stable vortices in CFL phase can ge
nerate this one-form symmetry.\n\nhttps://conference-indico.kek.jp/event/8
0/contributions/1598/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1598/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Complex poles and spectral functions of Landau gauge QCD and QCD-l
ike theories
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1599@conference-indico.kek.jp
DESCRIPTION:Speakers: Yui Hayashi\n\nWe investigate the analytic structure
s of the gluon and quark propagators of an effective model of the Landau g
auge QCD and QCD with many quark flavors\, which can be obtained by adding
effective mass terms to the standard Faddeev-Popov Lagrangian. We derive
general relationships between the number of complex poles and the sign of
the spectral function under some assumptions on the asymptotic behaviors o
f the propagator. Based on this relation\, in particular\, we find a trans
ition of the number of complex poles of the gluon propagator\, depending o
n the number of quark flavors and their mass. We furthermore discuss the f
ormal aspects of complex poles.\n\nhttps://conference-indico.kek.jp/event/
80/contributions/1599/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1599/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Infrared renormalon in the supersymmetric $\\mathbb{C}P^{N-1}$ mod
el on $\\mathbb{R}\\times S^1$
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1600@conference-indico.kek.jp
DESCRIPTION:Speakers: Okuto Morikawa\n\nIn the leading order of the large
$N$ approximation\, we study the renormalon ambiguity in the gluon (or mor
e appropriately\, photon) condensate in the two-dimensional supersymmetric
$\\mathbb{C}P^{N-1}$ model on $\\mathbb{R}\\times S^1$ with the $\\mathbb
{Z}_N$ twisted boundary conditions. In our large $N$ limit\, the combinati
on $\\Lambda R$\, where $\\Lambda$ is the dynamical scale and $R$ is the $
S^1$ radius\, is kept fixed (we set $\\Lambda R\\ll1$ so that the perturba
tive expansion with respect to the coupling constant at the mass scale $1/
R$ is meaningful). We extract the perturbative part from the large $N$ exp
ression of the gluon condensate and obtain the corresponding Borel transfo
rm $B(u)$. For $\\mathbb{R}\\times S^1$\, we find that the Borel singulari
ty at $u=2$\, which exists in the system on the un-compactified $\\mathbb{
R}^2$ and corresponds to twice the minimal bion action\, disappears. Inste
ad\, an unfamiliar renormalon singularity emerges at $u=3/2$ for the compa
ctified space $\\mathbb{R}\\times S^1$. The semi-classical interpretation
of this peculiar singularity is not clear because $u=3/2$ is not dividable
by the minimal bion action. It appears that our observation for the syste
m on $\\mathbb{R}\\times S^1$ prompts reconsideration on the semi-classica
l bion picture of the infrared renormalon.\n\nhttps://conference-indico.ke
k.jp/event/80/contributions/1600/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1600/
END:VEVENT
BEGIN:VEVENT
SUMMARY:A possible solution to the black hole puzzle in semi-classical gra
vity
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1601@conference-indico.kek.jp
DESCRIPTION:Speakers: Takeshi Morita\n\nWe discuss that the black hole geo
metry around the event horizon in semi-classical gravity could be signific
antly different from that of the classical one. This is due to the Hawking
radiation of the higher angular momentum modes of matter fields that was
believed to be irrelevant.\n\nhttps://conference-indico.kek.jp/event/80/co
ntributions/1601/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1601/
END:VEVENT
BEGIN:VEVENT
SUMMARY:TT-bar deformation in large N limit
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1602@conference-indico.kek.jp
DESCRIPTION:Speakers: Junichi Haruna\n\nWe consider two dimensional TT-bar
deformed O(N) invariant massive scalar theory in large N limit\, and inve
stigate its renormalizability at 1/N ( next to leading ) level. As a resul
t\, we find that we need to renormalize the deformation parameter at leadi
ng level\, and non-local counterterms at 1/N (next to leading) level. Also
we find that positivity of state space is violated in the UV region even
after renormalization.\n\nhttps://conference-indico.kek.jp/event/80/contri
butions/1602/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1602/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Quantum null energy condition\, weak cosmic censorship\, and holog
raphy
DTSTART:20191205T051500Z
DTEND:20191205T053000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1603@conference-indico.kek.jp
DESCRIPTION:Speakers: Akihiro Ishibashi\n\nWe discuss the compatibility of
AdS/CFT duality with the bulk and boundary causality which asserts that t
he fastest null geodesic connecting any two boundary points must lie entir
ely on the boundary. We show that if this type of causality fails without
breaking the averaged null energy condition (ANEC)\, the weak cosmic censo
rship must be violated. We also discuss relationships between the bulk and
boundary causality and a role of quantum null energy condition derived fr
om ANEC in the context of AdS/CFT duality.\n\nhttps://conference-indico.ke
k.jp/event/80/contributions/1603/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1603/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Localization of gauge field on 3-branes and Higgs mechanism
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1604@conference-indico.kek.jp
DESCRIPTION:Speakers: Masaki Kawaguchi\n\nWe provide complete and self-con
tained formulas about localization of massless/massive Abelian gauge field
s on topological solitons in generic D dimensions via a field dependent ga
uge kinetic term. The localization takes place when a stabilizer (a scalar
field) is condensed in the topological soliton. We show that the localize
d gauge bosons are massless when the stabilizer is neutral. On the other h
and\, they become massive for the charged stabilizer as a consequence of i
nterplay between the localization mechanism and the Higgs mechanism. final
ly\, As these application\, we show the relation with D-brane in superstri
ng theory.\n\nhttps://conference-indico.kek.jp/event/80/contributions/1604
/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1604/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sign flip triangulation of the 1-loop NMHV amplituhedron
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1605@conference-indico.kek.jp
DESCRIPTION:Speakers: Ryota Kojima\n\nIn this talk\, I will talk about the
triangulation of the amplituhedron. To obtain higher point amplitude from
the general amplituhedron\, we need to triangulate it into a simple one.
There is some way to triangulate the amplituhedron and some of this gives
new representations of the amplitude. I will briefly explain the amplituhe
dron and its property\, then I will talk about the new representation of t
he amplitude from the sign flip triangulation.\n\nhttps://conference-indic
o.kek.jp/event/80/contributions/1605/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1605/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Gravitational Thomas Precession Effect as a New Cosmological Probe
DTSTART:20191203T053000Z
DTEND:20191203T054500Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1606@conference-indico.kek.jp
DESCRIPTION:Speakers: Anand Hegde\n\nThomas Precession has been extensivel
y studied as a special relativistic effect.In this paper\, we study Thomas
like precession of spinning tops in the presence of gravitational fields.
To establish this effect we evaluate a system whose spin is defined by a
spin-four vector near a strong source of gravitational waves. It can be sh
own that for a system like hydrogen atom in a strong gravitational potenti
al\, the energy of gravitational Thomas precession is a significant effect
. This effect causes an additional splitting of energy levels near certain
sources and this has been studied via quantum mechanical perturbation the
ory. We further propose this effect can be observed in events involving Pr
imordial Black Holes\, Blackholes present in the center of galaxies etc. I
n this paper we examine the signatures of distribution of primordial black
holes using aforementioned gravitational Thomas Precession. This effect co
uld possibly be a new window to probe the early universe.\n\nhttps://confe
rence-indico.kek.jp/event/80/contributions/1606/
LOCATION:Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1606/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Entropy generation and decay of the cosmological constant in Liouv
ille gravity
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1607@conference-indico.kek.jp
DESCRIPTION:Speakers: Kitamoto Hiroyuki\n\nWe investigated quantum infrare
d dynamics in 2D Liouville gravity\nwith a positive cosmological constant
and a large central charge\n$c>25$. Superhorizon fluctuations of the confo
rmal mode of the\nmetric dynamically screen the cosmological constant\, an
d the dS\nentropy increases simultaneously. We can identify the dS entropy
\nwith the von Neumann entropy of the conformal zero mode. This\nquantum t
ime evolution can also be described by a classical\ninflation theory.\n\nh
ttps://conference-indico.kek.jp/event/80/contributions/1607/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1607/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Emergent quantum spacetime from stochastic processes of matrix mod
els
DTSTART:20191205T060000Z
DTEND:20191205T090000Z
DTSTAMP:20240809T093700Z
UID:indico-contribution-1608@conference-indico.kek.jp
DESCRIPTION:Speakers: Nobuyuki Matsumoto\n\nTowards formulating quantum gr
avity\, we present a mechanism of the emergence of spacetime geometry from
randomness. In [Fukuma-NM-Umeda\, [arXiv:1705.06097]]\, we defined for a
given stochastic process "the distance between configurations\," which enu
merates the difficulty of transition. In this talk\, we consider large-N m
atrix models\, in which we regard eigenvalues as spacetime coordinates. We
define the distance from the effective stochastic process for one eigenva
lue\, and argue that this definition can be interpreted in noncritical str
ing theory as probing the classical geometry with a D-instanton. We furthe
r show that\, when we apply our formalism to the U(N) matrix model by trea
ting the 't Hooft coupling as another dynamical variable\, an AdS black ho
le geometry emerges in the extended configuration space\, where the horizo
n corresponds to the Gross-Witten-Wadia phase transition point. This talk
is based on [Fukuma-NM\, in preparation].\n\nhttps://conference-indico.kek
.jp/event/80/contributions/1608/
LOCATION:In front of Kobayashi Hall\, Kenkyu-Honkan bldg. 1F (KEK)
URL:https://conference-indico.kek.jp/event/80/contributions/1608/
END:VEVENT
END:VCALENDAR