Creation of solitons and vortices by Bragg reflection of Bose-Einstein condensates in an optical lattice

Details Creation of solitons and vortices by Bragg reflection of Bose-Einstein condensates in an optical lattice Creation of solitons and vortices by Bragg reflection of Bose-Einstein condensates in an optical lattice

2002-06-27

arxiv.org/abs/cond-mat/0206543v2

Phys. Rev. Lett. 90, 110404 (2003).

Physics

Condensed Matter

5 pages including 5 figures (for higher resolution figures please email the authors)

Scientific paper

10.1103/PhysRevLett.90.110404

We study the dynamics of Bose-Einstein condensates in an optical lattice and harmonic trap. The condensates are set in motion by displacing the trap and initially follow simple semiclassical paths, shaped by the lowest energy band. Above a critical displacement, the condensate undergoes Bragg reflection. For high atom densities, the first Bragg reflection generates a train of solitons and vortices, which destabilize the condensate and trigger explosive expansion. At lower densities, soliton and vortex formation requires multiple Bragg reflections, and damps the center-of-mass motion.

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