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Vortex formation in a slowly rotating Bose-Einstein condensate confined in a harmonic-plus-Gaussian laser trap

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Abstract.

Motivated by the recent experiment at ENS [V. Bretin, S. Stock, Y. Seurin and, J. Dalibard, Phys. Rev. Lett. 92, 050403 (2004)], we study a rotating (non-)interacting atomic Bose-Einstein condensate confined in a harmonic-plus-Gaussian laser trap potential. By adjusting the amplitude of the Gaussian laser potential, one can make quadratic-plus-quartic potential, purely quartic potential, and quartic-minus-quadratic potential. We show that an interacting Bose-Einstein condensate confined in a harmonic-plus-Gaussian laser trap breaks the rotational symmetry of the Hamiltonian when rotational frequency is greater than one-half of the lowest energy surface mode frequency. We also show that by increasing the amplitude of the Gaussian laser trap, a vortex appears in a slowly rotating Bose-Einstein condensate. Moreover, one can also create a vortex in a slowly rotating non-interacting Bose-Einstein condensate confined in harmonic-plus-Gaussian laser potential.

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Authors and Affiliations

  1. The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34014, Trieste, Italy

    T. K. Ghosh

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  1. T. K. Ghosh
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Correspondence to T. K. Ghosh.

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Received: 24 June 2004, Published online: 24 August 2004

PACS:

03.75.Lm Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices and topological excitations - 05.30.Jp Boson systems

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Ghosh, T.K. Vortex formation in a slowly rotating Bose-Einstein condensate confined in a harmonic-plus-Gaussian laser trap. Eur. Phys. J. D 31, 101–105 (2004). https://doi.org/10.1140/epjd/e2004-00110-7

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  • DOI: https://doi.org/10.1140/epjd/e2004-00110-7

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