Flux tube profiles in two-color QCD at low temperature and high density

TL;DR

This study uses lattice simulations to analyze how the structure of color flux tubes in two-color QCD varies with temperature and density, revealing flux tube persistence even in high-density superfluid phases.

Contribution

It provides new insights into the flux tube behavior in dense two-color QCD at low temperatures, extending understanding of confinement in different phases.

Findings

Color electric field remains confined in flux tubes at high density.

Flux tube profiles are similar in hadronic and superfluid phases.

Lattice simulations confirm flux tube persistence across phases.

Abstract

We investigate the temperature and density dependence of the color flux tube structure of dense two-color QCD with $N_f = 2$ Wilson fermions by using a lattice simulation. From Refs. [1] and [2], we have already clarified the rich phase structure in the low temperature region, including the hadronic and superfluid phases. In this study we measure the quark-antiquark potential and color flux tube profiles in such a low temperature region and find that even in the high density superfluid phase, the color electric field is squeezed into a flux tube as in the low density hadronic phase.