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arXiv · 2008.11156

Bose-Bose mixtures in a weak-disorder potential: Fluctuations and superfluidity

Abdelaali Boudjemaa·Karima Abbas
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Abstract

We study the properties of a homogeneous dilute Bose-Bose gas in a weak-disorder potential at zero temperature. By using the perturbation theory, we calculate the disorder corrections to the condensate density, the equation of state, the compressibility, and the superfluid density as a function of density, strength of disorder, and miscibility parameter. It is found that the disorder potential may lead to modifying the miscibility-immiscibility condition and a full miscible phase turns out to be impossible in the presence of the disorder. We show that the intriguing interplay of the disorder and intra- and interspecies interactions may strongly influence the localization of each component, the quantum fluctuations, and the compressibility, as well as the superfluidity of the system.

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Abdelaali Boudjemaa, Karima Abbas. 2020-08-25. Bose-Bose mixtures in a weak-disorder potential: Fluctuations and superfluidity. https://doi.org/10.1103/physreva.102.023325

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