Phase and equation of state of finite density QC$_2$D at lower temperature

TL;DR

This study explores the phase structure and equation of state of dense two-color QCD at low temperatures, revealing a rich phase diagram and confirming the breaking of the conformal bound through lattice simulations.

Contribution

It provides new insights into the phase structure of dense two-color QCD at lower temperatures with refined lattice simulations and confirms the breaking of the conformal bound.

Findings

Rich phase structure below the pseudo-critical temperature

Similar results at different low temperatures with finer details

Confirmation of conformal bound breaking

Abstract

We investigate the phase structure and the equation of state (EoS) for dense two-color QCD at low temperatures, $T = 40$ MeV ($32^4$ lattice) and $T = 80$ MeV ($16^4$ lattice). A rich phase structure below the pseudo-critical temperature $T_c$ as a function of quark chemical potential $\mu$ has been revealed. By performing $T = 40$ MeV simulations, essentially similar results to the previous ones at $T = 80$ MeV are obtained, but several finer understandings are achieved. Breaking of the conformal bound is also confirmed thanks to smaller statistical errors. This talk is mainly based on Refs.~\cite{Iida:2022hyy, Iida:2024irv}. It also includes related studies and subsequent developments that were not mentioned in the original papers.