Uniformly frustrated bosonic Josephson-junction arrays
Kenichi Kasamatsu
DOI 10.1103/PhysRevA.79.021604 · Physical Review A
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Abstract
We derive a uniformly frustrated XY model that describes two-dimensional Josephson-junction arrays consisting of rotating Bose-Einstein condensates trapped by both a harmonic trap and a corotating deep optical lattice. The harmonic trap makes the coupling constant of the model have a nonuniform parabolic dependence. We study the ground state through Monte Carlo simulations in a wide range of the frustration parameter f, revealing a rich variety of vortex patterns.
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