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Rotational bosonic current in a quasi-condensate confined in an optical toroidal trap

Aranya B. Bhattacherjee, E. Courtade, E. Arimondo

cond-mat.stat-mecharXiv:cond-mat/0311653

Abstract

We investigate the possibility of inducing a bosonic current which is rotational in a pseudo 1D quasi-condensate confined in an optical toroidal trap. The stability of such a current is also analyzed using hydrodynamics approach. We find that such a current is uniform when the circular symmetry is preserved and energetically stable when the modes of elementary excitations are restricted to one dimension. This scheme allows to distinguish between a quasi and a true condensate by measuring the rotational spectra of the sample.

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