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  • Title: Observation of vortex pinning in Bose-Einstein condensates.
    Author: Tung S, Schweikhard V, Cornell EA.
    Journal: Phys Rev Lett; 2006 Dec 15; 97(24):240402. PubMed ID: 17280257.
    Abstract:
    We report the observation of vortex pinning in rotating gaseous Bose-Einstein condensates. Vortices are pinned to columnar pinning sites created by a corotating optical lattice superimposed on the rotating Bose-Einstein condensates. We study the effects of two types of optical lattice: triangular and square. In both geometries we see an orientation locking between the vortex and the optical lattices. At sufficient intensity the square optical lattice induces a structural crossover in the vortex lattice.
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