Giant Spin Relaxation of an Ultracold Cesium Gas

Giant Spin Relaxation of an Ultracold Cesium Gas

We have measured the rate of inelastic collisions in a cloud of doubly polarized ground-state cesium atoms ( F=mF=4) confined in a magnetic trap for temperatures T between 8 and 70μK. We find a two-body rate coefficient varying as T−0.63. At 8 μK it reaches 4×10−12cm3s−1 which is 3 orders of magnitu...

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Veröffentlicht in:Physical review letters 1998-03, Vol.80 (9), p.1869-1872
Hauptverfasser: Söding, J., Guéry-Odelin, D., Desbiolles, P., Ferrari, G., Dalibard, J.
Format: Artikel
Sprache:eng
Schlagworte:
Physics
Quantum Physics
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Zusammenfassung:We have measured the rate of inelastic collisions in a cloud of doubly polarized ground-state cesium atoms ( F=mF=4) confined in a magnetic trap for temperatures T between 8 and 70μK. We find a two-body rate coefficient varying as T−0.63. At 8 μK it reaches 4×10−12cm3s−1 which is 3 orders of magnitude larger than predicted, ruling out a Bose-Einstein condensation of Cs in this internal state.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.80.1869