Thermal suppression of phase separation in condensate mixtures

Abstract

We examine the role of thermal fluctuations in binary condensate mixtures of dilute atomic gases. In particular, we use Hartree-Fock-Bogoliubov with Popov approximation to probe the impact of non-condensate atoms to the phenomenon of phase-separation in two-component Bose-Einstein condensates. We demonstrate that, in comparison to $T=0$, there is a suppression in the phase-separation of the binary condensates at $T\ne 0$. This arises from the interaction of the condensate atoms with the thermal cloud. We also show that, when $T\ne 0$ it is possible to distinguish the phase-separated case from miscible from the trends in the correlation function. However, this is not the case at $T=0$.

5 pages, 4 figures

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• Analytical solutions of the coupled Gross-Pitaevskii equations for the three-species Bose-Einstein condensates
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