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arXiv · 1601.01471

Dark-Bright Solitons in a Superfluid Bose-Fermi Mixture

Marek Tylutki·Alessio Recati·Franco Dalfovo·Sandro Stringari
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Abstract

The recent experimental realization of Bose-Fermi superfluid mixtures of dilute ultracold atomic gases has opened new perspectives in the study of quantum many-body systems. Depending on the values of the scattering lengths and the amount of bosons and fermions, a uniform Bose-Fermi mixture is predicted to exhibit a fully mixed phase, a fully separated phase or, in addition, a purely fermionic phase coexisting with a mixed phase. The occurrence of this intermediate configuration has interesting consequences when the system is nonuniform. In this work we theoretically investigate the case of solitonic solutions of coupled Bogoliubov-de Gennes and Gross-Pitaevskii equations for the fermionic and bosonic components, respectively. We show that, in the partially separated phase, a dark soliton in Fermi superfluid is accompanied by a broad bosonic component in the soliton, forming a dark-bright soliton which keeps full spatial coherence.

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Marek Tylutki, Alessio Recati, Franco Dalfovo, Sandro Stringari. 2016-05-11. Dark-Bright Solitons in a Superfluid Bose-Fermi Mixture. https://doi.org/10.1088/1367-2630%2F18%2F5%2F053014

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