Rotational spectra of weakly interacting Bose-Einstein condensates

Details Rotational spectra of weakly interacting Bose-Einstein condensates Rotational spectra of weakly interacting Bose-Einstein condensates

2000-05-26

arxiv.org/abs/cond-mat/0005480v2

Phys. Rev. A 63, 023616 (2001)

Physics

Condensed Matter

12 pages, 4 EPS-figures, typos corrected and references updated

Scientific paper

10.1103/PhysRevA.63.023616

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 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.

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