Induced P-wave Superfluidity in Asymmetric Fermi Gases

TL;DR

This paper predicts two novel intra-species P-wave superfluid phases in asymmetric Fermi gases, induced by phonons and density fluctuations, potentially observable in spin-polarized Fermi gas experiments.

Contribution

It introduces the concept of induced intra-species P-wave superfluidity in asymmetric Fermi systems across BEC and BCS regimes, a new theoretical insight.

Findings

P-wave superfluid phases appear in asymmetric Fermi gases

Phonons induce P-wave superfluidity in the BEC limit

Density fluctuations induce P-wave superfluidity in the BCS limit

Abstract

We show that two new intra-species P-wave superfluid phases appear in two-component asymmetric Fermi systems with short-range S-wave interactions. In the BEC limit, phonons of the molecular BEC induce P-wave superfluidity in the excess fermions. In the BCS limit, density fluctuations induce P-wave superfluidity in both the majority and the minority species. These phases may be realized in experiments with spin-polarized Fermi gases.