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arXiv · 2112.06585

Weakly-interacting Bose-Bose mixtures from the functional renormalisation group

Felipe Isaule·Ivan Morera
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Abstract

We provide a detailed presentation of the functional renormalisation group (FRG) approach for weakly-interacting Bose-Bose mixtures, including a complete discussion on the RG equations. To test this approach, we examine thermodynamic properties of balanced three-dimensional Bose-Bose gases at zero and finite temperatures and find a good agreement with related works. We also study ground-state energies of repulsive Bose polarons by examining mixtures in the limit of infinite population imbalance. Finally, we discuss future applications of the FRG to novel problems in Bose-Bose mixtures and related systems.

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Felipe Isaule, Ivan Morera. 2022-01-20. Weakly-interacting Bose-Bose mixtures from the functional renormalisation group. https://doi.org/10.3390/condmat7010009

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