An impurity in a heteronuclear two-component Bose mixture

Giacomo Bighin; Alessia Burchianti; Francesco Minardi; Tommaso Macrì

doi:10.1103/physreva.106.023301

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arXiv · 2109.07451

An impurity in a heteronuclear two-component Bose mixture

Giacomo Bighin·Alessia Burchianti·Francesco Minardi·Tommaso Macrì

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Abstract

We study the fate of an impurity in an ultracold heteronuclear Bose mixture, focusing on the experimentally relevant case of a $^{41}$K-$^{87}$Rb mixture, with the impurity in a $^{41}$K hyperfine state. Our work provides a comprehensive description of an impurity in a BEC mixture with contact interactions across its phase diagram. We present results for the miscible and immiscible regimes, as well as for the impurity in a self-bound quantum droplet. Here, varying the interactions, we find novel, exotic states where the impurity localizes either at the center or at the surface of the droplet.

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Giacomo Bighin, Alessia Burchianti, Francesco Minardi, Tommaso Macrì. 2021-09-15. An impurity in a heteronuclear two-component Bose mixture. https://doi.org/10.1103/physreva.106.023301

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