The density of states method at non-zero chemical potential

TL;DR

This paper applies the density of states method to lattice QCD calculations at high densities, revealing a potential triple-point connecting three phases in the phase diagram.

Contribution

It demonstrates the use of the density of states method for exploring the QCD phase diagram at high densities with unimproved staggered fermions.

Findings

Indication of a triple-point in the phase diagram.

Application of the density of states method at high densities.

Evidence of phase connections in lattice QCD.

Abstract

We study the QCD phase diagram by first principle lattice calculations at so far unreached high densities. For this purpose we employ the density of states method. Unimproved staggered fermions, which describe four quark flavors in the continuum are used in this analysis. Though the method is quite expensive, small lattices show an indication for a triple-point connecting three different phases on the phase diagram.