Scissors mode and superfluidity of a trapped Bose-Einstein condensed gas

Details Scissors mode and superfluidity of a trapped Bose-Einstein condensed gas Scissors mode and superfluidity of a trapped Bose-Einstein condensed gas

1999-07-20

arxiv.org/abs/cond-mat/9907293v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.83.4452

We investigate the oscillation of a dilute atomic gas generated by a sudden rotation of the confining trap (scissors mode). This oscillation reveals the effects of superfluidity exhibited by a Bose-Einstein condensate. The scissors mode is investigated also in a classical gas above T_c in various collisional regimes. The crucial difference with respect to the superfluid case arises from the occurence of low frequency components, which are responsible for the rigid value of the moment of inertia. Different experimental procedures to excite the scissors mode are discussed.

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