Vortex Lattice Structures of a Bose-Einstein Condensate in a Rotating Triangular Lattice Potential

Details Vortex Lattice Structures of a Bose-Einstein Condensate in a Rotating Triangular Lattice Potential Vortex Lattice Structures of a Bose-Einstein Condensate in a Rotating Triangular Lattice Potential

2007-06-06

arxiv.org/abs/0706.0759v1

Physics

Condensed Matter

Other Condensed Matter

5 pages, 5 figures

Scientific paper

10.1103/PhysRevA.76.053628

We study the vortex pinning effect in a Bose-Einstein Condensate in the presence of a rotating lattice potential by numerically solving the time-dependent Gross-Pitaevskii equation. We consider a triangular lattice potential created by blue-detuned laser beams. By rotating the lattice potential, we observe a transition from the Abrikosov vortex lattice to the pinned vortex lattice. We investigate the transition of the vortex lattice structure by changing conditions such as angular velocity, strength, and lattice constant of a rotating lattice potential. Our simulation results clearly show that the lattice potential has a strong vortex pinning effect when the vortex density coincides with the density of the pinning points.

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