Multiband bosons in optical lattices

Abstract

We study a gas of repulsively interacting bosons in an optical lattice and explore the physics beyond the lowest band Hubbard model. Utilizing a generalized Gutzwiller ansatz, we find how the lowest band physics is modified by the inclusion of the first excited bands. In contrast to the prediction of the lowest band Bose-Hubbard model, a reentrant behavior of superfluidity is envisaged as well as decreasing width of the Mott lobes at strong coupling.

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Cited by in corpus (41)

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• REVIEW. Quantum optics with ultracold quantum gases: towards the full quantum regime of the light-matter interaction
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• Dynamics of cold bosons in optical lattices: Effects of higher Bloch bands
• Finite temperature theory of superfluid bosons in optical lattices
• Accuracy of quantum simulators with ultracold dipolar molecules: a quantitative comparison between continuum and lattice descriptions
• Condensates induced by interband coupling in a double-well lattice
• Optimal time-dependent lattice models for nonequilibrium dynamics
• Confined p-band Bose-Einstein condensates
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• Interaction-induced excited-band condensate in a double-well optical lattice
• Effective three-body interactions for bosons in a double-well confinement
• Phase diagram of the Bose Kondo-Hubbard model
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• Management of the Correlations of Ultracold Bosons in Triple Wells
• Realizing multiband states with ultracold dipolar quantum simulators
• Two-state Bose-Hubbard model in the hard-core boson limit
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• Competing order in two-band Bose-Hubbard chains with extended-range interactions
• Magnetic phases of orbital bipartite optical lattices
• Effects of finite temperature on the robustness of the Mott insulator phase in pseudo one-dimensional Bose-Hubbard Model
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• Orbital Optical Raman Lattice