Two-colour QCD with heavy quarks at finite densities

TL;DR

This paper applies an advanced density-of-states method to study SU(2) gauge theory with heavy quarks at finite temperature and density, revealing a smooth density increase without critical phenomena.

Contribution

It extends the LLR density-of-states approach to finite-density QCD with heavy quarks, enabling precise probability distribution calculations over many orders of magnitude.

Findings

Density rises smoothly with chemical potential

No critical phenomena observed at finite densities

Method achieves exponential error suppression

Abstract

We extend the density-of-states approach to gauge systems (LLR method) to QCD at finite temperature and density with heavy quarks. The approach features an exponential error suppression and yields the Polyakov loop probability distribution function over a range of more than hundred orders of magnitude. SU(2) gauge theory is considered in the confinement and the high-temperature phase, and at finite densities of heavy quarks. In the latter case, a smooth rise of the density with the chemical potential is observed, and no critical phenomenon associated with deconfinement due to finite densities is found.