Loss of superfluidity in a Bose-Einstein condensate on an optical lattice via a novel classical phase transition

Details Loss of superfluidity in a Bose-Einstein condensate on an optical lattice via a novel classical phase transition Loss of superfluidity in a Bose-Einstein condensate on an optical lattice via a novel classical phase transition

2002-11-11

arxiv.org/abs/cond-mat/0211215v2

Phys. Lett. A. 308 (2003) 302-307

Physics

Condensed Matter

Soft Condensed Matter

10 Latex pages, 6 eps figures

Scientific paper

10.1016/S0375-9601(03)00059-8

We predict the loss of superfluidity in a Bose-Einstein condensate (BEC) trapped in a combined optical and axially-symmetric harmonic potentials during a resonant collective excitation initiated by a periodic modulation of the atomic scattering length $a$, when the modulation frequency equals twice the radial trapping frequency or multiples thereof. This classical dynamical transition is marked by a loss of superfluidity in the BEC and a subsequent destruction of the interference pattern upon free expansion. Suggestion for future experiment is made.

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