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KEK-THEORY Workshop 2024

11–13 Dec 2024
KEK Tsukuba Campus
Asia/Tokyo timezone

Contribution List

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1. Tensor renormalization group and application to elementary particle physics
Prof. Shinji Takeda
11/12/2024, 09:30

Tensor network is a powerful numerical tool to compute the wave function of quantum many-body systems and to directly evaluate the path integrals in quantum field theory. In this talk, I mainly explain the latter case in detail. After introducing the basics of the tensor network. I give an overview of its recent progress especially in elementary particle physics. As specific examples, I...
2. Recent progress in tensor network approaches for condensed matter physics
Dr Tsuyoshi Okubo
11/12/2024, 10:45
3. Bosonization revisited: application to the sign problem and lattice chiral fermion
Dr Hiroki Ohata
11/12/2024, 13:30
16. deSitter from M-Theory
Dr Gregory Loges
11/12/2024, 14:50
10. Tensor renormalization group study of (1+1)-dimensional U(1) gauge-Higgs model at θ=π with Luescher's admissibility condition
Dr Shin-ichiro Akiyama
11/12/2024, 14:50
15. Non-supersymmetric heterotic strings
Mr Arata Ishige
11/12/2024, 15:15
11. Tensor renormalization group study of 3D Yang-Mills theories with the reduced tensor network formulation
Dr Atis Yosprakob
11/12/2024, 15:15
12. Grassmann bond-weighted tensor renormalization group approach to 1+1D two-color QCD with staggered fermions at finite density
Mr Ho Pai Kwok
11/12/2024, 15:40
14. Quantum Black Brane in the 4d Standard Model
Mr Hayate Kimura
11/12/2024, 15:40
17. Species scale in one-loop correction
Mr Yuri Michinobu
11/12/2024, 16:05
13. Tensor renormalization group analysis of entanglement entropy in (1+1)-dimensional XY model
Dr Gota Tanaka
11/12/2024, 16:05
21. 't Hooft line in 4D U(1) lattice gauge theory, and microscopic descriptions of dyon's statistics
Mr Soma Onoda
11/12/2024, 17:00
18. Non-Lagrangian approach to GKP-Witten relation by conformal smearing
Prof. Sinya Aoki
11/12/2024, 17:00
22. Proper Effective Temperature and Order Parameters in Relativistic Non-Equilibrium Steady States
Prof. Shin Nakamura
11/12/2024, 17:25
19. Quantum tunneling, decoherence and the beginning of the Universe from Lefschetz thimble real-time simulations
Prof. Jun Nishimura
11/12/2024, 17:25

Monte　Carlo simulations of quantum time-evolution based on the real-
time path integral have been thought to be extremely difficult since it involves a
phase factor exp(iS) in the integrand, which causes a severe sign
problem. We apply the Lefschetz thimble method with various new
techniques to such systems. In this talk, I would like to discuss a new
understanding of quantum tunneling...
23. A scaling relation in large-N gauge theories at finite temperature
Prof. Takeshi Morita
11/12/2024, 17:50
20. Complex Langevin Lattice QCD for Color-Superconductivity at Extremely High Density
Kohtaroh MIURA (KEK IPNS)
11/12/2024, 17:50
4. Partially fault-tolerant quantum computing architecture
Dr Yutaro Akahoshi
12/12/2024, 09:30
5. Quantum Error Correction and Holography
Prof. Tatsuma Nishioka
12/12/2024, 10:45
6. Decoding quantum information from chaos: beyond the standard situation
Prof. Yoshifumi Nakata
12/12/2024, 13:30

A central challenge in large-scale quantum information processing is
managing noise in quantum systems. Quantum error correction (QEC)
addresses this by encoding quantum states into quantum error
correction codes (QECCs) before noise occurs and decoding them
afterward. Recently, QEC has attracted significant attention in
theoretical physics due to its potential connections to...
27. Selection rules of topological solitons from non-invertible symmetries in axion electrodynamics
Dr Ryo Yokokura
12/12/2024, 14:50
25. Universal structure of islands in evaporating black holes
Dr Yoshinori Matsuo
12/12/2024, 14:50
28. Anyon condensation in mixed-state topological order #93
Dr Ken Kikuchi
12/12/2024, 15:15
24. Narain CFT from error-correcting code via integers of cyclotomic field
Mr Takumi Oikawa
12/12/2024, 15:15
29. Bridging two semiclassical confinement mechanisms: monopole and center vortex
Dr Yui Hayashi
12/12/2024, 15:40
26. Entanglement R'enyi entropy and boson-fermion duality in the massless Thirring model
Mr Harunobu Fujimura
12/12/2024, 15:40
36. Localized RG flows on composite defects and C-theorem
Dr Dongsheng Ge
12/12/2024, 16:05
37. Thermal Area Law in Long-Range Interacting Systems
Dr Donghoon Kim
12/12/2024, 16:05
31. Defining IKKT matrix model by gauge fixing Lorentz symmetry
Mr Worapat Piensuk
12/12/2024, 16:50
34. Unitarity of string geometry theory
Prof. Matsuo Sato
12/12/2024, 16:50
35. K27 as a symmetry of closed bosonic strings and branes
Dr Keith Glennon
12/12/2024, 17:15
30. Numerical studies of the type IIB matrix model with the gauge-fixed Lorentz symmetry
Mr Ashutosh Tripathi
12/12/2024, 17:15
32. Complex Langevin simulation of the IKKT matrix model with or without "gauge-fixing" the Lorentz symmetry
Mr Naoyuki Yamamori
12/12/2024, 17:40
38. Revisiting Hawking Radiation via Generalized Uncertainty Principle
Mr Tin-Long Chau
12/12/2024, 17:40

The generalized uncertainty relation is expected to be an essential element in a theory of quantum gravity. We examine its effect on the Hawking radiation of a Schwarzschild black hole formed from collapse by incorporating a minimal uncertainty length scale into the radial coordinate of the background. This is implemented in both the ingoing Vaidya coordinates and a family of freely falling...
33. TBA
Dr Kohta Hatakeyama
12/12/2024, 18:05
39. UV Origin of Late-time Hawking Radiation
Mr Cheng-Tsung WANG
12/12/2024, 18:05

We reexamined the connection between the Hawking radiation of a Schwarzschild black hole formed from collapse and ultraviolet(UV) physics with the local Lorentz symmetry violation or the existence of a minimal length. Significant modifications are reported after the scrambling time in both cases, which reflects the UV sensitivity of Hawking radiation. Depending on the physics at the...
7. Tensor Networks as Conceptual and Computational Tools for Statistical Physics
Prof. Masaki Oshikawa
13/12/2024, 09:00
8. Advancements in Numerical Methods: Synergy of Tensor Networks and Quantum Algorithms
Prof. Hiroshi Ueda
13/12/2024, 10:15
9. Some rigorous and numerical results for renormalization groups of tensor networks
Prof. Slava Rychkov
13/12/2024, 11:30
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