Functional RG for imbalanced many-fermion systems

TL;DR

This paper applies the Functional Renormalisation Group method to imbalanced many-fermion systems, revealing a first-order phase transition from superfluid to normal phase at critical density mismatches, with implications for cold atom experiments.

Contribution

It introduces the use of the Functional Renormalisation Group approach to analyze phase transitions in imbalanced fermionic systems.

Findings

First-order phase transition identified at critical density mismatch.

Application of FRG to fermionic cold atom systems.

Discussion on relevance to nuclear and quark matter studies.

Abstract

The Functional Renormalisation Group approach is applied the imbalanced many-fermion systems. The system is found to exhibit the first order phase transition from the superfluid to normal phase when the density (chemical potential) mismatch becomes larger then some critical values. The perspectives of using fermionic cold atoms to study nuclear/quark matter is briefly discussed.