Thermal Transitions in Dense Two-Colour QCD

TL;DR

This study investigates thermal phase transitions in dense two-colour QCD using larger lattice volumes to better understand finite volume effects and improve extrapolation methods, providing insights into QCD-like theories at high density.

Contribution

It extends previous two-colour QCD studies by employing larger lattice volumes and more diquark sources to refine the analysis of thermal transitions and finite volume effects.

Findings

Enhanced understanding of finite volume effects on phase transitions.

Improved extrapolation techniques for diquark sources.

Insights into the thermal behavior of dense two-colour QCD.

Abstract

The infamous sign problem makes it impossible to probe dense (baryon density $\mu_B>0$) QCD at temperatures near or below the deconfinement threshold. As a workaround, one can explore QCD-like theories such as two-colour QCD (QC2D) which don't suffer from this sign problem but are qualitively similar to real QCD. Previous studies on smaller lattice volumes have investigated deconfinement and colour superfluid to normal matter transitions. In this study we look at a larger lattice volume $N_s=24$ in an attempt to disentangle finite volume and finite temperature effects. We also fit to a larger number of diquark sources to better allow for extrapolation to zero diquark source.