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Dynamical classical superfluid-insulator transition in a Bose-Einstein condensate on an optical lattice | | Sadhan K. Adhikari
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1 Nov 2002 | | Journal: | J. Phys. B: At. Mol. Opt. Phys. 36 (2003) 2725-2732 | | Subject: | Soft Condensed Matter; Other | cond-mat.soft cond-mat.other | | Abstract: | We predict a dynamical classical superfluid-insulator transition in a Bose-Einstein condensate (BEC) trapped in a combined optical and axially-symmetric harmonic potentials initiated by a periodic modulation of the radial trapping potential. The transition is marked by a loss of phase coherence in the BEC and a subsequent destruction of the interference pattern upon free expansion. For a weak modulation of the radial potential the phase coherence is maintained. For a stronger modulation and a longer time of holding in the modulated trap, the phase coherence is destroyed signaling a classical superfluid-insulator transition. The results are illustrated by a complete numerical solution of the axially-symmetric mean-field Gross-Pitaevskii equation for a repulsive BEC. Suggestion for future experiment is made. | | Source: | arXiv, cond-mat/0211026 | | Services: | Forum | Review | PDF | Favorites | |
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