Reweighting QCD simulations with dynamical overlap fermions

TL;DR

This paper demonstrates a reweighting algorithm for lattice QCD simulations with overlap fermions, enabling efficient transition between quark masses and accurate computation of the chiral condensate.

Contribution

It introduces and tests a reweighting method specifically for overlap fermion simulations in the epsilon regime, improving computational efficiency.

Findings

Reweighting algorithm performs well in epsilon regime

Accurate condensate values obtained from eigenvalue distributions

Method shows promise for future lattice QCD studies

Abstract

I apply a recently developed algorithm for reweighting simulations of lattice QCD from one quark mass to another to simulations performed with overlap fermions in the epsilon regime. I test it by computing the condensate from distributions of the low lying eigenvalues of the Dirac operator. Results seem favorable.