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Weakly-Interacting Bose-Bose Mixtures from the Functional Renormalisation Group

We provide a detailed presentation of the functional renormalisation group (FRG) approach to 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.

MDPI AG

Felipe Isaule Ivan Morera

2021

Title: Weakly-Interacting Bose-Bose Mixtures from the Functional Renormalisation Group

Description:

We provide a detailed presentation of the functional renormalisation group (FRG) approach to 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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Weakly-Interacting Bose-Bose Mixtures from the Functional Renormalisation Group

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