Symmetry-conserving vortex clusters in small rotating clouds of ultracold bosons

Details Symmetry-conserving vortex clusters in small rotating clouds of ultracold bosons Symmetry-conserving vortex clusters in small rotating clouds of ultracold bosons

2008-07-01

arxiv.org/abs/0807.0251v2

Phys. Rev. A 78, 011606(R) (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Revtex 4 with 4 color figures. Published version. Ref. [25] (experimental) was added. For related papers, see http://www.pri

Scientific paper

10.1103/PhysRevA.78.011606

The properties of a special class of correlated many-body wave functions, named rotating vortex clusters (RVCs), that preserve the total angular momentum of a small cloud of trapped rotating bosons are investigated. They have lower energy and provide a superior description for the formation of vortices compared to the mean-field Gross-Pitaevskii (GP) states that break the rotational symmetry. The GP vortex states are shown to be wave packets composed of such RVC states. Our results suggest that, for a small number of bosons, the physics is different from that of ideal Bose-Einstein condensates which characterize larger assemblies

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