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Low-energy elementary excitations of a trapped Bose-condensed gas

  • We develop a method of finding analytical sotutions of the Bogolyubov-de Gennes equations for the excitations of a Bose condensate in the Thomas-Fermi regime in harmonic traps of any asymmetry and introduce a classification of eigenstates. In the case of cylindrical symmetry we emphasize the presence of an accidental degeneracy in the excitation spectrum at certain values of the projection of orbital angular momentum on the symmetry axis and discuss possible consequences of the degeneracy in the context of new signatures of Bose- Einstein condensation

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Author:P. Öhberg, E. L. Surkov, I. Tittonen, Stig Stenholm, Martin Wilkens, G. V. Shlyapnikov
Document Type:Article
Year of first Publication:1997
Year of Completion:1997
Release Date:2017/03/24
Source:Physical Review / A. - 56 (1997), 5, S. 3346 - 3349
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Institution name at the time of publication:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik