Non-Abelian magnetic monopole in a Bose-Einstein condensate

Details Non-Abelian magnetic monopole in a Bose-Einstein condensate Non-Abelian magnetic monopole in a Bose-Einstein condensate

2008-07-09

arxiv.org/abs/0807.1433v3

Phys.Rev.Lett.102:080403,2009

Physics

Condensed Matter

Other Condensed Matter

5 pages, 1 color figure; v2 modified according to referees' suggestions, some typos corrected; v3 minor modifications, publish

Scientific paper

10.1103/PhysRevLett.102.080403

Recently, an effective non-Abelian magnetic field with a topology of a monopole was shown to emerge from the adiabatic motion of multilevel atoms in spatially varying laser fields [J. Ruseckas et al., Phys. Rev. Lett. 95, 010404 (2005)]. We study this monopole in a Bose-Einstein condensate (BEC) of degenerate dressed states and find that the topological charge of the pseudospin cancels the monopole charge resulting in a vanishing gauge invariant charge. As a function of the laser wavelength, different stationary states are classified in terms of their effect to the monopole part of the magnetic field and a cross-over to vortex ground state is observed.

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