Quench-Induced Floquet Topologicalᅠp-Wave Superfluids
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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.
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Foster, Matthew S., Gurarie, Victor, Dzero, Maxim, et al.. "Quench-Induced Floquet Topologicalᅠp-Wave Superfluids." Physical Review Letters, 113, no. 7 (2014) American Physical Society: https://doi.org/10.1103/PhysRevLett.113.076403.