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Bulletin of the American Physical Society

Creation and Characterization of a BEC of $^{7}$Li

D. Dries, Mark D. Junker, Y. P. Chen, C. Welford, J. M. Hitchcock, Randall G. Hulet

Published May 17, 2006• 0 citations
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Physical Review A•Sep 1, 2023•5 citations
Creation and Characterization of a BEC of 7^{7}7Li
7^{7}7Li BEC in a millimeter-scale Ioffe-Pritchard trap
Pairing of Fermionic 6^66Li Throughout the BEC-BCS Crossover
Optical Molecular Spectroscopy of the BEC/BCS Crossover in 6^{6}6Li
Studies of the Efimov Effect in 7^77Li
Dual-species Bose-Einstein condensates of 7^{7}7Li and 133^{133}133Cs
We report the creation of dual-species Bose-Einstein condensates (BECs) of 7^{7}7Li and 133^{133}133Cs. 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 aCs=123a0a_{\rm{Cs}} = 123a_0aCs​=123a0​, aLi=484a0a_{\rm{Li}} = 484a_0aLi​=484a0​, and aLiCs=248a0a_{\rm{LiCs}} = 248a_0aLiCs​=248a0​. These scattering lengths allow for efficient evaporation and sympathetic cooling. The dual-species BECs are typically produced with 1.5×1041.5\times 10^41.5×104 Cs atoms and 6.0×1036.0\times 10^36.0×103 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.
We report the creation of dual-species Bose-Einstein condensates (BECs) of 7Li^{7}\mathrm{Li}7Li and 133Cs^{133}\mathrm{Cs}133Cs. These BECs are formed in a bichromatic optical dipole trap created with 1550- and 780-nm laser beams. During the production process, an external magnetic field of 886 G is applied to adjust the scattering lengths to aCs=123a0,aLi=484a0{a}_{\mathrm{Cs}}=123{a}_{0}, {a}_{\mathrm{Li}}=484{a}_{0}aCs​=123a0​,aLi​=484a0​, and aLiCs=248a0{a}_{\mathrm{LiCs}}=248{a}_{0}aLiCs​=248a0​. These scattering lengths allow for efficient evaporation and sympathetic cooling. The dual-species BECs are typically produced with $1.5\ifmmode\times\else\texttimes\fi{}{10}^{4}$ Cs atoms and $6.0\ifmmode\times\else\texttimes\fi{}{10}^{3}$ 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.