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arXiv · 2306.02698

Dual-species Bose-Einstein condensates of $^{7}$Li and $^{133}$Cs

Y. -D. Chen·W. -X. Li·Y. -T. Sun·Q. -C. Chen·P. -Y. Chang·S. Tung
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Abstract

We report the creation of dual-species Bose-Einstein condensates (BECs) of $^{7}$Li and $^{133}$Cs. These BECs are formed in a bichromatic optical dipole trap created with 1550-nm and 780-nm laser beams. During the production process, an external magnetic field of 886~G is applied to adjust the scattering lengths to $a_{\rm{Cs}} = 123a_0$, $a_{\rm{Li}} = 484a_0$, and $a_{\rm{LiCs}} = 248a_0$. These scattering lengths allow for efficient evaporation and sympathetic cooling. The dual-species BECs are typically produced with $1.5\times 10^4$ Cs atoms and $6.0\times 10^3$ Li atoms. This quantum degenerate mixture of Li and Cs provides an ideal platform for exploring phenomena such as polarons and Efimov trimers, as well as for creating ground-state LiCs molecules.

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Y. -D. Chen, W. -X. Li, Y. -T. Sun, Q. -C. Chen, P. -Y. Chang, S. Tung. 2023-06-05. Dual-species Bose-Einstein condensates of $^{7}$Li and $^{133}$Cs. https://arxiv.org/abs/2306.02698

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