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arXiv · 1906.10035

Cavity-mediated unconventional pairing in ultracold fermionic atoms

Frank Schlawin·Dieter Jaksch
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Abstract

We investigate long-range pairing interactions between ultracold fermionic atoms confined in an optical lattice which are mediated by the coupling to a cavity. In the absence of other perturbations, we find three degenerate pairing symmetries for a two-dimensional square lattice. By tuning a weak local atomic interaction via a Feshbach resonance or by tuning a weak magnetic field, the superfluid system can be driven from a topologically trivial s-wave to topologically ordered, chiral superfluids containing Majorana edge states. Our work points out a novel path towards the creation of exotic superfluid states by exploiting the competition between long-range and short-range interactions.

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Frank Schlawin, Dieter Jaksch. 2019-06-24. Cavity-mediated unconventional pairing in ultracold fermionic atoms. https://doi.org/10.1103/physrevlett.123.133601

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