Phys. Rev. Lett. 94, 190401 (2005) [4 pages]

Structural Phase Transitions of Vortex Matter in an Optical Lattice

Abstract

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H. Pu¹, L. O. Baksmaty², S. Yi¹, and N. P. Bigelow²
¹Department of Physics and Astronomy, and Rice Quantum Institute, Rice University, Houston, Texas 77251-1892, USA
²Department of Physics and Astronomy, and Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14627, USA

Received 28 April 2004; published 16 May 2005

We consider the vortex structure of a rapidly rotating trapped atomic Bose-Einstein condensate in the presence of a corotating periodic optical lattice potential. We observe a rich variety of structural phases which reflect the interplay of the vortex-vortex and vortex-lattice interactions. The lattice structure is very sensitive to the ratio of vortices to pinning sites and we observe structural phase transitions and domain formation as this ratio is varied.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.94.190401

DOI:

10.1103/PhysRevLett.94.190401

PACS:

03.75.Mn, 03.75.Nt

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Phys. Rev. Lett. 94, 190401 (2005) [4 pages]

Structural Phase Transitions of Vortex Matter in an Optical Lattice