Unquenched Studies Using the Truncated Determinant Algorithm

TL;DR

This paper employs a truncated determinant algorithm to investigate key features of full QCD, including topological charge, string breaking, and eta prime mass, on coarse lattices with light quarks.

Contribution

It introduces the use of a truncated determinant algorithm for high-statistics studies of QCD effects on coarse lattices with light quarks.

Findings

Topological charge distributions consistent with full QCD.

Observation of string breaking in static energy.

Measurement of the eta prime mass.

Abstract

A truncated determinant algorithm is used to study the physical effects of the quark eigenmodes associated with eigenvalues below 420 MeV. This initial high statistics study focuses on coarse ($6^4$) lattices (with O($a^2$) improved gauge action), light internal quark masses and large physical volumes. Three features of full QCD are examined: topological charge distributions, string breaking as observed in the static energy and the eta prime mass.