Critical rotation of a harmonically trapped Bose gas

Details Critical rotation of a harmonically trapped Bose gas Critical rotation of a harmonically trapped Bose gas

2002-01-31

arxiv.org/abs/cond-mat/0201568v2

Phys. Rev. Lett. 88, 250403 (2002).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures, submitted to PRL

Scientific paper

10.1103/PhysRevLett.88.250403

We study experimentally and theoretically a cold trapped Bose gas under critical rotation, i.e. with a rotation frequency close to the frequency of the radial confinement. We identify two regimes: the regime of explosion where the cloud expands to infinity in one direction, and the regime where the condensate spirals out of the trap as a rigid body. The former is realized for a dilute cloud, and the latter for a Bose-Einstein condensate with the interparticle interaction exceeding a critical value. This constitutes a novel system in which repulsive interactions help in maintaining particles together.

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