Quench-induced Floquet topological p-wave superfluids

TL;DR

This paper demonstrates that a quench near a p-wave Feshbach resonance in ultracold atomic gases can induce a stable, self-generated Floquet topological superfluid with Majorana edge modes, avoiding external driving.

Contribution

It introduces a novel method to create a Floquet topological superfluid through a quench, without external periodic driving, leveraging intrinsic dynamics.

Findings

Formation of Majorana edge modes in the superfluid

Superfluid stability before instability sets in

Self-generated periodic modulation from dynamics

Abstract

Ultracold atomic gases in two dimensions tuned close to a p-wave Feshbach resonance were expected to exhibit topological superfluidity, but these were found to be experimentally unstable. We show that one can induce a topological Floquet superfluid if weakly interacting atoms are brought suddenly close ("quenched") to such a resonance, in the time before the instability kicks in. The resulting superfluid possesses Majorana edge modes, yet differs from a conventional Floquet system as it is not driven externally. Instead, the periodic modulation is self-generated by the dynamics.