KEK Theory Workshop 2026

Session

Plenary Session

25 Nov 2026, 09:30

K03 Seminar Hall (KEK Tsukuba Campus)

Conveners

Plenary Session: I

• Asato Tsuchiya (Shizuoka University)

Plenary Session: II

• Asato Tsuchiya (Shizuoka University)

Plenary Session: III

• Asato Tsuchiya (Shizuoka University)

Plenary Session: IV

• Shin Nakamura (Chuo University)

Plenary Session: V

• Shin Nakamura (Chuo University)

Plenary Session: VI

• Shin Nakamura (Chuo University)

Plenary Session: VII

• Takeshi Morita (Shizuoka University)

Plenary Session: VIII

• Takeshi Morita (Shizuoka University)

1. Memorial remarks for Prof. Kitazawa

Hikaru Kawai (Osaka Metropolitan University)

25/11/2026, 09:30

2. Emergence of space-time and matter from matrix model

Hikaru Kawai (Osaka Metropolitan University)

25/11/2026, 09:40

3. Open quantum systems: From many-body physics to feedback control

Masaya Nakagawa (The University of Tokyo)

25/11/2026, 11:00

Open quantum systems are quantum systems that interact with their surrounding environments. Their nonunitary dynamics alter fundamental concepts in many-body physics, such as symmetry and spontaneous symmetry breaking. In this talk, I will first review some basic concepts of open quantum systems, including quantum channels, quantum master equations, and their symmetries. I will then discuss...

4. 6d/5d gauge theories from web diagrams

Hirotaka Hayashi (Tokai University)

25/11/2026, 13:30

5. New de Sitter space holography from time-like entanglement

Tadashi Takayanagi (YITP, Kyoto University)

26/11/2026, 09:30

6. Optimal transport, holography and quantum chaos

Norihiro Tanahashi (Kyoto University)

26/11/2026, 10:45

The emergence of spacetime geometry from quantum degrees of freedom is a central problem in quantum gravity and holography. We propose an approach based on optimal transport, in which the Wasserstein distance defines a geometry on the space of quantum states. In simple quantum-mechanical models, this approach yields an emergent holographic direction parameterized by an energy-like coordinate....

7. Advances in Hamiltonian lattice theory for realizing chiral gauge theories

Tatsuya Yamaoka (The University of Osaka)

26/11/2026, 13:30

8. Information theoretic approaches to closed universe

Takato Mori (Rikkyo University)

27/11/2026, 09:30

9. Microstates of black holes and of whatnot

Masaki Shigemori (Nagoya University / YITP, Kyoto University)

27/11/2026, 10:45