Dynamical Vortex Phases in a Bose-Einstein Condensate Driven by a Rotating Optical Lattice

Journal Article · Fri Dec 15 04:00:00 EST 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.97.240404· OSTI ID:20861465

Kasamatsu, Kenichi ^[1]; Tsubota, Makoto ^[2]

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1. Department of General Education, Ishikawa National College of Technology, Tsubata, Ishikawa 929-0392 (Japan)
2. Department of Physics, Osaka City University, Sumiyoshi-Ku, Osaka 558-8585 (Japan)

We present simulation results of the vortex dynamics in a trapped Bose-Einstein condensate in the presence of a rotating optical lattice. Changing the potential amplitude and the relative rotation frequency between the condensate and the optical lattice, we find a rich variety of dynamical phases of vortices. The onset of these different phases is described by the force balance of a driving force, a pinning force, and vortex-vortex interactions. In particular, when the optical lattice rotates faster than the condensate, an incommensurate effect leads to a vortex-liquid phase supported by the competition between the driving force and the dissipation.

• OSTI ID: 20861465
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 97; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLITUDES
BALANCES
BOSE-EINSTEIN CONDENSATION
MAGNETIC FLUX
POTENTIALS
ROTATION
SIMULATION
TRAPPING
VORTICES