Chiral multicritical points driven by isospin density in the Ginzburg-Landau approach

TL;DR

This paper investigates how isospin density influences the chiral tricritical point in the QCD phase diagram using a Ginzburg-Landau framework, revealing complex phase structures and multicritical points.

Contribution

It introduces a generalized Ginzburg-Landau approach to analyze the effects of isospin imbalance on chiral tricritical points in QCD.

Findings

TCP splits into multiple multicritical points

Rich phase structures including inhomogeneous condensates

Influence of isospin density on phase diagram topology

Abstract

We study how a chiral tricritical point (TCP) on QCD phase diagram is affected by the imbalance of up and down quark densities (isospin density), using the generalized Ginzburg-Landau (GL) approach. The resulting phase diagram near TCP shows a rich fine structure which includes inhomogeneities of both the chiral and the charged pion condensations. It turns out that the TCP splits into multicritical points.