Publicação: Loss of superfluidity in a Bose-Einstein condensate on an optical lattice via a novel classical phase transition
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Elsevier B.V.
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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. (C) 2003 Elsevier B.V. B.V. All rights reserved.
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Bose-Einstein condensation, superfluid-insulator transition
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Inglês
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Physics Letters A. Amsterdam: Elsevier B.V., v. 308, n. 4, p. 302-307, 2003.
