Phys. Rev. A 78, 063623 (2008) [4 pages]Fragility of fragmentation in Bose-Einstein condensatesReceived 29 July 2008; revised 13 October 2008; published 29 December 2008 A Bose-Einstein condensate produced by a Hamiltonian which is rotationally or translationally symmetric may be fragmented as a direct result of these symmetries. A corresponding mean-field unfragmented state, with an identical energy to leading order in the number of particles, can generally be constructed. As a consequence, vanishingly weak symmetry-breaking perturbations destabilize the fragmented state, which would thus be extremely difficult to realize experimentally and lead to an unfragmented condensate. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.78.063623
DOI:
10.1103/PhysRevA.78.063623
PACS:
03.75.Kk, 05.30.Jp, 03.75.Lm
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