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Cooling of Sr to high phase-space density by laser and sympathetic cooling in isotopic mixtures

G. Ferrari·R. E. Drullinger·N. Poli·F. Sorrentino·G. M. Tino
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Abstract

Based on an experimental study of two-body and three-body collisions in ultracold strontium samples, a novel optical-sympathetic cooling method in isotopic mixtures is demonstrated. Without evaporative cooling, a phase-space density of $6\times10^{-2}$ is obtained with a high spatial density that should allow to overcome the difficulties encountered so far to reach quantum degeneracy for Sr atoms.

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G. Ferrari, R. E. Drullinger, N. Poli, F. Sorrentino, G. M. Tino. 2006-01-12. Cooling of Sr to high phase-space density by laser and sympathetic cooling in isotopic mixtures. https://doi.org/10.1103/physreva.73.023408

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