Abstract:
Starting from the Gross-Pitaevskii energy functional of the 3D Bose-Einstein Condensate, we derive approximately the energy functional and the effective coupling constant of the quasi-2D condensate. The evolution of the quasi-2D condensate wave function is studied by a variational method. Low energy excitation spectra for both positive and negative scattering lengths are analyzed. The condition of collapse instability of a quasi-2D Bose gas with attractive particle interaction is also proposed.
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Received 31 October 2001 / Received in final form 1st March 2002 Published online 28 June 2002
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Wang, ZC., Yang, HW. & Yin, S. Low energy excitations of a quasi-2D Bose-Einstein condensate. Eur. Phys. J. D 20, 117–119 (2002). https://doi.org/10.1140/epjd/e2002-00112-5
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DOI: https://doi.org/10.1140/epjd/e2002-00112-5