Single flavour filtering for RHMC in BQCD

TL;DR

This paper discusses methods for efficient single-flavour filtering algorithms for RHMC in BQCD, aiming to reduce computational costs in 1+1+1 flavour QED+QCD simulations.

Contribution

It introduces filtering techniques for single-flavour RHMC algorithms implemented in BQCD, addressing a gap in efficient simulation of multiple quark flavours.

Findings

Enhanced filtering methods for single-flavour RHMC

Implementation within BQCD improves simulation efficiency

Facilitates more accurate 1+1+1 flavour QED+QCD simulations

Abstract

Filtering algorithms for two degenerate quark flavours have advanced to the point that, in 2+1 flavour simulations, the cost of the strange quark is significant compared with the light quarks. This makes efficient filtering algorithms for single flavour actions highly desirable, in particular when considering 1+1+1 flavour simulations for QED+QCD. Here we discuss methods for filtering the RHMC algorithm that are implemented within BQCD, an open-source Fortran program for Hybrid Monte Carlo simulations.