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arXiv · 0806.0419

Odd-frequency pairing in a binary mixture of bosonic and fermionic cold atoms

Ryan M. Kalas·Alexander V. Balatsky·Dmitry Mozyrsky
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Abstract

We study fermionic superfluidity in a boson-single-species-fermion cold atom mixture. We argue that apart from the standard p-wave fermion pairing mediated by the phonon field of the boson gas, the system also exhibits s-wave pairing with the anomalous correlator being an odd function of time or frequency. We show that such a superfluid phase can have a much higher transition temperature than the p-wave and may exist for sufficiently strong couplings between fermions and bosons. These conditions for odd-frequency pairing are favorable close to the value of the coupling at which the mixture phase-separates. We evaluate the critical temperatures for this system and discuss the experimental realization of this superfluid in ultracold atomic gases.

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Ryan M. Kalas, Alexander V. Balatsky, Dmitry Mozyrsky. 2008-12-11. Odd-frequency pairing in a binary mixture of bosonic and fermionic cold atoms. https://doi.org/10.1103/physrevb.78.184513

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