The chiral transition on a 24^3x10 lattice with N_f=2 clover sea quarks studied by overlap valence quarks

TL;DR

This study investigates the finite temperature chiral transition in QCD using overlap fermions on a 24^3x10 lattice with N_f=2 dynamical Wilson-clover quarks, analyzing spectral properties to identify the transition.

Contribution

It demonstrates the application of overlap fermions to study chiral symmetry restoration in lattice QCD with existing gauge configurations, providing new insights into the transition's spectral and topological features.

Findings

Spectral density changes across the transition

Alterations in local chirality and localization of low-lying modes

Variation in topological and selfdual structures of gauge fields

Abstract

Overlap fermions are particularly well suited to study the finite temperature dynamics of the chiral symmetry restoration transition of QCD, which might be just an analytic crossover. Using gauge field configurations on a 24^3x10 lattice with N_f=2 flavours of dynamical Wilson-clover quarks generated by the DIK collaboration, we compute the lowest 50 eigenmodes of the overlap Dirac operator and try to locate the transition by fermionic means. We analyse the spectral density, local chirality and localisation properties of the low-lying modes and illustrate the changing topological and (anti-) selfdual structure of the underlying gauge fields across the transition.