Symmetry breaking in small rotating cloud of trapped ultracold Bose atoms

Details Symmetry breaking in small rotating cloud of trapped ultracold Bose atoms Symmetry breaking in small rotating cloud of trapped ultracold Bose atoms

2006-10-18

arxiv.org/abs/cond-mat/0610512v1

Phys. Rev. A 76, 013625 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevA.76.013625

We study the signatures of rotational and phase symmetry breaking in small rotating clouds of trapped ultracold Bose atoms by looking at rigorously defined condensate wave function. Rotational symmetry breaking occurs in narrow frequency windows, where the ground state of the system has degenerated with respect to the total angular momentum, and it leads to a complex wave function that exhibits vortices clearly seen as holes in the density, as well as characteristic vorticity. Phase symmetry (or gauge symmetry) breaking, on the other hand, is clearly manifested in the interference of two independent rotating clouds.

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