Quantum droplet in a mixture of Bose-Fermi superfluids
Abstract
We study the formation of quantum droplets in the mixture of a single-component Bose-Einstein condensate (BEC), and a two-species Fermi superfluid across a wide Feshbach resonance. With repulsive boson-boson and attractive boson-fermion interactions, we show that quantum droplets can be stabilized by attractive fermion-fermion interactions in the Bardeen-Cooper-Schieffer (BCS) side of the resonance, and can also exist in deep BEC regime under weak boson-fermion interactions. We map out the phase diagram for stable droplets with respect to the boson-boson and boson-fermion interactions, and discuss the role of different types of quantum fluctuations in the relevant regions of the BCS-BEC crossover. Our work reveals the impact of fermion pairing on the formation of quantum droplets in Bose-Fermi mixtures, and provides a useful guide for future experiments.
Cite
@article{arxiv.2004.05737,
title = {Quantum droplet in a mixture of Bose-Fermi superfluids},
author = {Jing-Bo Wang and Jian-Song Pan and Xiaoling Cui and Wei Yi},
journal= {arXiv preprint arXiv:2004.05737},
year = {2020}
}
Comments
7 pages, 5 figures