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Observation of Anomalous Spin-State Segregation in a Trapped Ultracold Vapor



H J. Lewandowski, D M. Harber, D Whitaker, Eric A. Cornell


We observe counter-intuitive spin segregation in an inhomogeneous sample of ultra-cold, non-condensed, magnetically trapped Rubidium atomswith effectively two internal spin states. We use spatially selective microwave spectroscopy to verify a simple model'that accounts for thdifferential forces that apply to the two spin states. In any simple understanding of the cloud dynamics, the differential forces are far too smalto account for the dramatic transient spin polarizations observed. The underlying mechanism remains to be elucidated.
Physical Review Letters
No. 7


phase separation, ramsey spectroscopy


Lewandowski, H. , Harber, D. , Whitaker, D. and Cornell, E. (2002), Observation of Anomalous Spin-State Segregation in a Trapped Ultracold Vapor, Physical Review Letters (Accessed June 21, 2024)


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Created January 31, 2002, Updated October 12, 2021