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 6×10−2 is obtained with a high spatial density that should allow us to overcome the difficulties encountered so far to reach quantum degeneracy for Sr atoms.
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. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - STAMPA. - 73:(2006), pp. 023408-1-023408-4. [10.1103/PhysRevA.73.023408]
Cooling of Sr to high phase-space density by laser and sympathetic cooling in isotopic mixtures
POLI, NICOLA;SORRENTINO, FIODOR;TINO, GUGLIELMO MARIA
2006
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 6×10−2 is obtained with a high spatial density that should allow us to overcome the difficulties encountered so far to reach quantum degeneracy for Sr atoms.
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