摘要
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 fermionfermion interactions on the Bardeen–Cooper–Schrieffer(BCS)side of the resonance,and can also exist in the 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.
作者
Jing-Bo Wang
Jian-Song Pan
Xiaoling Cui
Wei Yi
汪景波;潘建松;崔晓玲;易为(CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China;Department of Physics,National University of Singapore,Singapore 117542,Singapore;Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;Songshan Lake Materials Laboratory,Dongguan 523808,China;CAS Center For Excellence in Quantum Information and Quantum Physics,Hefei 230026,China)
基金
Supported by the National Natural Science Foundation of China under Grant Nos.11974331
11421092 and 11534014
the National Key Research and Development Program of China under Grant Nos.2016YFA0301700,2017YFA0304100,2018YFA0307600 and 2016YFA0300603。
