Observation of anomalous spin-state segregation in a trapped ultra-cold vapor

Details Observation of anomalous spin-state segregation in a trapped ultra-cold vapor Observation of anomalous spin-state segregation in a trapped ultra-cold vapor

2001-09-26

arxiv.org/abs/cond-mat/0109476v1

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.88.070403

We observe counter-intuitive spin segregation in an inhomogeneous sample of ultra-cold, non-condensed Rubidium atoms in a magnetic trap. We use spatially selective microwave spectroscopy to verify a model that accounts for the differential forces on two internal spin states. In any simple understanding of the cloud dynamics, the forces are far too small to account for the dramatic transient spin polarizations observed. The underlying mechanism remains to be elucidated.

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