Phase separation in asymmetrical fermion superfluids

TL;DR

This paper investigates phase separation in asymmetric fermion superfluids, proposing that a mixed normal and superfluid phase is energetically favored, which can serve as a probe for superfluidity in cold atom experiments.

Contribution

It introduces the concept of phase separation as the ground state in asymmetric fermion systems and suggests its use as an experimental probe.

Findings

Mixed phase is energetically favored in asymmetric fermion systems.

Phase separation can be used to detect superfluidity in atomic traps.

Theoretical framework applicable to cold atom and high density QCD systems.

Abstract

Motivated by recent developments on cold atom traps and high density QCD we consider fermionic systems composed of two particle species with different densities. We argue that a mixed phase composed of normal and superfluid components is the energetically favored ground state. We suggest how this phase separation can be used as a probe of fermion superfluidity in atomic traps.