Lee-Huang-Yang effects in the ultracold mixture of 23Na and 87Rb with attractive interspecies interactions

Guo, Zhichao; Jia, Fan; Li, Lintao; Ma, Yinfeng; Hutson, Jeremy M.; Cui, Xiaoling; Wang, Dajun

Abstract

The beyond-mean-field Lee-Huang-Yang (LHY) correction is ubiquitous in dilute ultracold quantum gases. However, its effects are often elusive due to the typically much larger influence of the mean-field (MF) energy. In this work, we study an ultracold mixture of 23Na and 87Rb with tunable attractive interspecies interactions. The LHY effects manifest in the formation of self-bound quantum liquid droplets and the expansion dynamics of the gas-phase sample. A liquid-to-gas-phase diagram is obtained by measuring the critical atom numbers below which the self-bound behavior disappears. In stark contrast to trapped gas-phase condensates, the gas-phase mixture formed following the liquid-to-gas-phase transition shows an anomalous expansion featuring a larger release energy for increasing MF attractions.

Citation

Guo, Z., Jia, F., Li, L., Ma, Y., Hutson, J. M., Cui, X., & Wang, D. (2021). Lee-Huang-Yang effects in the ultracold mixture of 23Na and 87Rb with attractive interspecies interactions. Physical Review Research, 3(3), Article 033247. https://doi.org/10.1103/physrevresearch.3.033247

• Journal Article Type: Article
• Acceptance Date: Aug 24, 2021
• Online Publication Date: Sep 14, 2021
• Publication Date: 2021-11
• Deposit Date: Oct 7, 2021
• Publicly Available Date: Dec 2, 2021
• Journal: Physical Review Research
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 3
• Issue: 3
• Article Number: 033247
• DOI: https://doi.org/10.1103/physrevresearch.3.033247
• Related Public URLs: https://arxiv.org/abs/2105.01277