RIKEN-IBS Joint Workshop on Mathematical Approaches to Nature: from High-energy Physics to Biology

Session

Day 1 Late afternoon

10 Dec 2025, 16:00

Seminar Room B440 (IBS Center for Theoretical Physics of the Universe)

Description

Chair: Siyao Li

8. From KdV hierarchy to 1/24

Dr Zhe Wang (RIKEN iTHEMS)

10/12/2025, 16:00

Invited speaker

It was first observed by Witten and soon proved by Kontsevich that the two-point correlation function of the 2d quantum gravity theory is a solution of the KdV hierarchy. Since then, relationships between 2d topological field theories coupling with gravity and integrable hierarchies have been studied in a great detail. In this talk, I will explain a canonical correspondence between semisimple...

6. Exact WKB formulation of canonical quantization on time-dependent background

Dr Ryo Namba (RIKEN iTHEMS)

10/12/2025, 16:45

Invited speaker

Divergence in perturbative expansions is where interesting physics takes place. Particle production on time-dependent backgrounds, as one such example, is interpreted as transition from one vacuum to another. In this talk, I establish that several conceptual issues in the conventional approach to particle production in cosmology may be eliminated by fully employing the exact WKB methodology, a...