Phys. Rev. Lett. 93, 160405 (2004) [4 pages]Matter-Wave Gap Vortices in Optical LatticesReceived 30 April 2004; published 13 October 2004 We predict the existence of spatially localized nontrivial topological states of a Bose-Einstein condensate with repulsive atomic interactions confined by an optical lattice. These nonlinear localized states, matter-wave gap vortices, carry a vortexlike phase dislocation and exist in the gaps of the matter-wave band-gap spectrum due to the Bragg scattering. We discuss the structure, stability, and formation dynamics of the gap vortices in the case of two-dimensional optical lattices. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.160405
DOI:
10.1103/PhysRevLett.93.160405
PACS:
03.75.Lm
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