31 July 2023 to 4 August 2023
America/Chicago timezone

Decimation map in 2D for accelrating HMC

31 Jul 2023, 16:00
20m
Ramsey Auditorium

Ramsey Auditorium

Speaker

Nobuyuki Matsumoto (RIKEN BNL)

Description

To conquer topological freezing in gauge systems, we develop a variant of trivializing map proposed in Luecher 2019. We in particular consider the 2D U(1) pure gauge model, which is the simplest gauge system with topology. The trivialization is divided into several stages, each of which corresponds to integrating local degrees of freedom, the decimation, which can be seen as coarse-graining. The simulation using the map has a gain in autocorrelation in wall clock time compared to conventional HMC which likely survives even in the continuum limit.

Topical area Algorithms and Artificial Intelligence

Primary author

Presentation materials