Phys. Rev. A 63, 023616 (2001) [5 pages]Rotational spectra of weakly interacting Bose-Einstein condensatesReceived 5 June 2000; published 18 January 2001 We study the spectrum of rotating Bose-Einstein condensates in the limit of weak repulsive interactions and present analytical and numerical results for energies and wave functions. While the low-lying states are of collective nature, the high-lying states are dominated by single-particle excitations and can be accurately approximated by simple polynomial expressions. In the limit that the number of particles is large compared to the number of excited quanta, the single-particle states become excellent approximations to the eigenstates, and a rather simple ordering scheme is obtained. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.63.023616
DOI:
10.1103/PhysRevA.63.023616
PACS:
03.75.Fi, 05.30.Jp, 67.40.Db
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