Superfluidity of an interacting trapped quasi-2D Bose gas

Details Superfluidity of an interacting trapped quasi-2D Bose gas Superfluidity of an interacting trapped quasi-2D Bose gas

2007-11-09

arxiv.org/abs/0711.1423v1

Phys. Rev. A 77, 023618 (2008)

Physics

Condensed Matter

Other Condensed Matter

9 pages, 7 figures

Scientific paper

10.1103/PhysRevA.77.023618

We investigate the harmonically trapped interacting Bose gas in a quasi-2D geometry using the classical field method. The system exhibits quasi-long-range order and non-classical rotational inertia at temperatures below the Berezinskii-Kosterlitz-Thouless cross-over to the superfluid state. In particular, we compute the scissors-mode oscillation frequencies and find that the irrotational mode changes its frequency as the temperature is sweeped across the cross-over thus providing microscopic evidence for the emergence of superfluidity.

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