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Article Dans Une Revue Physical Review Letters Année : 2010

Spin Self-Rephasing and Very Long Coherence Times in a Trapped Atomic Ensemble

Résumé

We perform Ramsey spectroscopy on the ground state of ultracold Rb87 atoms magnetically trapped on a chip in the Knudsen regime. Field inhomogeneities over the sample should limit the 1/e contrast decay time to about 3 s, while decay times of 58±12s are actually observed. We explain this surprising result by a spin self-rephasing mechanism induced by the identical spin rotation effect originating from particle indistinguishability. We propose a theory of this synchronization mechanism and obtain good agreement with the experimental observations. The effect is general and may appear in other physical systems.
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Dates et versions

hal-03785887 , version 1 (19-08-2023)

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Christian Deutsch, Fernando Ramírez-Martínez, Clément Lacroûte, Friedemann Reinhard, Tapio Schneider, et al.. Spin Self-Rephasing and Very Long Coherence Times in a Trapped Atomic Ensemble. Physical Review Letters, 2010, 105, pp.20401. ⟨10.1103/PhysRevLett.105.020401⟩. ⟨hal-03785887⟩
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