$p_{x}+ip_{y}$ superfluid from s-wave interactions of fermionic cold atoms

TL;DR

This paper proposes a novel method to create a $p_{x}+ip_{y}$ superfluid from s-wave interactions in cold fermionic atoms using a topological Berry phase, offering new avenues for studying topological quantum phenomena.

Contribution

It introduces a technique to generate chiral p-wave superfluidity from s-wave interactions via a topological Berry phase, bypassing the challenges of p-wave Feshbach resonance.

Findings

Proposes a method to induce $p_{x}+ip_{y}$ superfluidity from s-wave interactions.

Suggests detection of the superfluid through spontaneous Hall mass current.

Provides a theoretical framework for realizing topological superfluids in cold atom systems.

Abstract

Two-dimensional ($p_{x}+ip_{y}$) superfluids/superconductors offer a playground for studying intriguing physics such as quantum teleportation, non-Abelian statistics, and topological quantum computation. Creating such a superfluid in cold fermionic atom optical traps using p-wave Feshbach resonance is turning out to be challenging. Here we propose a method to create a $p_{x}+ip_{y}$ superfluid directly from an s-wave interaction making use of a topological Berry phase, which can be artificially generated. We discuss ways to detect the spontaneous Hall mass current, which acts as a diagnostic for the chiral p-wave superfluid.