Journal
PHYSICAL REVIEW A
Volume 79, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.79.021604
Keywords
Bose-Einstein condensation; flux-line lattice; Josephson effect; Monte Carlo methods; optical lattices; quantum optics; X-Y model
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Funding
- JSPS [18740213]
- Grants-in-Aid for Scientific Research [18740213] Funding Source: KAKEN
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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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