Topology with Dynamical Overlap Fermions

TL;DR

This paper presents dynamical QCD simulations using overlap fermions, introduces a new method to handle topological sectors without changing them, and measures topological susceptibility across different quark masses.

Contribution

The paper introduces a novel method for simulating topological sectors without sector changes in dynamical overlap fermion simulations.

Findings

Successful implementation of the new method on small lattices

Measurement of topological susceptibility at various quark masses

Insights into topological sector dynamics in lattice QCD

Abstract

We perform dynamical QCD simulations with $n_f=2$ overlap fermions by hybrid Monte-Carlo method on $6^4$ to $8^3\times 16$ lattices. We study the problem of topological sector changing. A new method is proposed which works without topological sector changes. We use this new method to determine the topological susceptibility at various quark masses.