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arXiv 1307.2256cond-mat.quant-gascond-mat.mes-hallcond-mat.supr-con
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猝灭诱导Floquet拓扑p波超流体

Quench-induced Floquet topological p-wave superfluids

Matthew S. Foster, Victor Gurarie, Maxim Dzero, Emil A. Yuzbashyan

摘要:

二维超冷原子气体被调谐到接近p波费什巴赫共振,被认为表现出拓扑超流性,但实验发现这些是不稳定的。我们表明,可以诱导拓扑Floquet超流体,如果弱相互作用的原子突然接近(“淬火”)这样的共振,在不稳定踢之前的时间。由此产生的超流体具有马约拉纳边缘模式,但不同于传统的Floquet系统,因为它不是外部驱动的。相反,周期性调制是由动态自生成的。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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