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Article Dans Une Revue Physical Review A Année : 2022

Simultaneous sub-Doppler laser cooling of Li 6 and Li 7 isotopes

Tim de Jongh
Maxime Dixmerias
Christophe Salomon
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Résumé

We report on the simultaneous sub-Doppler laser cooling of 6 Li and 7 Li isotopes using gray molasses operating on their respective D 1 atomic transitions. For 7 Li we show that the sub-Doppler cooling can be achieved with two distinct-type transitions, where the upper level can be either of the two 2 2 P 1/2 hyperfine states. We obtain temperatures of ∼85 μK, with atom numbers of ∼10 8 , and phase-space densities in the range of 10 −6 −10 −5 for both isotopes. These conditions provide a good starting point for loading the mixture into an optical dipole trap and performing evaporative cooling to quantum degeneracy. Our work provides a valuable simplification for the preparation of ultracold 6 Li-7 Li mixtures, which were proven to be a successful system for the study of impurity physics and Bose-Fermi superfluids.
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Dates et versions

hal-03875892 , version 1 (28-11-2022)
hal-03875892 , version 2 (28-11-2022)

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Gentle Dash, Tim de Jongh, Maxime Dixmerias, Christophe Salomon, Tarik Yefsah. Simultaneous sub-Doppler laser cooling of Li 6 and Li 7 isotopes. Physical Review A, 2022, 106 (3), pp.033105. ⟨10.1103/PhysRevA.106.033105⟩. ⟨hal-03875892v2⟩
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