Observation of Vortex Pinning in Bose-Einstein Condensates

Details Observation of Vortex Pinning in Bose-Einstein Condensates Observation of Vortex Pinning in Bose-Einstein Condensates

2006-07-26

arxiv.org/abs/cond-mat/0607697v2

Physics

Condensed Matter

Other Condensed Matter

4 pages, 6 figures. Replaced by final version to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.97.240402

We report the observation of vortex pinning in rotating gaseous Bose-Einstein condensates (BEC). The vortices are pinned to columnar pinning sites created by a co-rotating optical lattice superimposed on the rotating BEC. We study the effects of two different types of optical lattice, triangular and square. With both geometries we see an orientation locking between the vortex and the optical lattices. At sufficient intensity the square optical lattice induces a structural cross-over in the vortex lattice.

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