Topology, chiral and screening transitions at finite density in two colour QCD

TL;DR

This study investigates how topological susceptibility, Polyakov loop, and chiral condensate behave at finite density in two-color QCD with eight flavors, revealing simultaneous transitions and effects of Pauli blocking at specific chemical potentials.

Contribution

It provides the first lattice analysis of topological and chiral transitions at finite density in two-color QCD with multiple flavors, highlighting the interplay of these phenomena.

Findings

Topological susceptibility drops at a critical chemical potential

Transitions of Polyakov loop and chiral condensate coincide

Pauli blocking occurs at higher chemical potentials

Abstract

The behaviour of the topological susceptibility in QCD with two colours and 8 flavours of quarks is studied at nonzero temperature on the lattice across the finite density transition. It is shown that its signal drops at a (pseudo-)critical chemical potential mu_c. The Polyakov loop and the chiral condensate undergo their transitions at the same value. Pauli blocking supervenes at a value of the chemical potential larger than mu_c.