Complex Langevin Dynamics in 1+1d QCD at Non-Zero Densities
Sebastian Schmalzbauer, Jacques Bloch
TL;DR
This paper investigates the effectiveness of complex Langevin dynamics in simulating 1+1 dimensional QCD at finite density, highlighting limitations and the impact of gauge cooling techniques on simulation accuracy.
Contribution
It introduces gauge cooled complex Langevin simulations for 1+1d QCD at non-zero densities and analyzes their performance and limitations in the strong coupling regime.
Findings
Gauge cooling affects fermion determinant distributions.
The method fails in certain parameter regions for small quark masses.
Different cooling schemes influence the accuracy of observables.
Abstract
We present our results obtained from gauge cooled complex Langevin simulations in 1+1d QCD at non-zero densities in the strong coupling regime with unrooted staggered fermions. For small quark masses there are regions of the chemical potential where this method fails to reproduce correct results. In these parameter ranges we studied the effect of different gauge cooling schemes on the distributions of the fermion determinant as well as of observables.
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