Phys. Rev. Lett. 87, 030404 (2001) [4 pages]Fragmented Condensate Ground State of Trapped Weakly Interacting Bosons in Two DimensionsReceived 21 November 2000; published 2 July 2001 The ground state and its structure for a rotating, harmonically trapped N-boson system with a weak repulsive contact interaction are studied as the angular momentum L increases up to 3N. We show that the ground state is generally a fragmented condensate due to angular momentum conservation. In response to an (arbitrarily weak) asymmetric perturbation of the trap, however, the fragmented ground state can be transformed into a single condensate state. We manifest this intrinsic instability by calculating the conditional probability distributions, which show patterns analogous to the boson density distributions predicted by mean-field theory. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.030404
DOI:
10.1103/PhysRevLett.87.030404
PACS:
03.75.Fi, 05.30.Jp, 67.40.Db, 67.40.Vs
See AlsoComment: G. M. Kavoulakis, S. M. Reimann, and B. Mottelson, Comment on “Fragmented Condensate Ground State of Trapped Weakly Interacting Bosons in Two Dimensions”, Phys. Rev. Lett. 89, 079403 (2002). |
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