Superfluidity of an interacting trapped quasi-two-dimensional Bose gas

Tapio Petteri Simula, M J Davis, P B Blakie

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We investigate the harmonically trapped interacting Bose gas in a quasi-two-dimensional geometry using the classical field method. The system exhibits quasi-long-range order and nonclassical rotational inertia at temperatures below the Berezinskii-Kosterlitz-Thouless crossover 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 swept across the crossover thus providing microscopic evidence for the emergence of superfluidity.
Original languageEnglish
Pages (from-to)1 - 9
Number of pages9
JournalPhysical Review A
Issue number2
Publication statusPublished - 2008
Externally publishedYes

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