Non-Abelian magnetic monopole in a Bose-Einstein condensate
Abstract
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.
Cite
@article{arxiv.0807.1433,
title = {Non-Abelian magnetic monopole in a Bose-Einstein condensate},
author = {Ville Pietilä and Mikko Möttönen},
journal= {arXiv preprint arXiv:0807.1433},
year = {2009}
}
Comments
5 pages, 1 color figure; v2 modified according to referees' suggestions, some typos corrected; v3 minor modifications, published version