Accelerating Hasenbusch's acceleration of Hybrid Monte Carlo

TL;DR

This paper explores an alternative splitting method for pseudo-fermionic actions in Hybrid Monte Carlo simulations, achieving a 5-20% speed-up over Hasenbusch's original approach.

Contribution

It introduces a new splitting technique for pseudo-fermionic actions that improves computational efficiency in lattice QCD simulations.

Findings

Achieved 5-20% speed-up in production runs

Validated the effectiveness of the new splitting method

Compared performance with Hasenbusch's original proposal

Abstract

Hasenbusch has proposed splitting the pseudo-fermionic action into two parts, in order to speed-up Hybrid Monte Carlo simulations of QCD. We have tested a different splitting, also using clover-improved Wilson fermions. An additional speed-up between 5 and 20% over the original proposal was achieved in production runs.