Multiband-Driven Superfluid-Insulator Transition of Fermionic Atoms in Optical Lattices: A Dynamical Mean-Field-Theory Study
arXiv:0803.4347 · doi:10.1103/PhysRevA.77.043624
Abstract
The superfluid-insulator transitions of the fermionic atoms in optical lattices are investigated by the two-site dynamical mean-field theory. It is shown that the Mott transition occurs as a result of the multiband effects. The quasiparticle weight in the superfluid state decreases significantly, as the system approaches the Mott transition point. By changing the interaction and the orbital splitting, we obtain the phase diagram at half filling. The numerical results are discussed in comparison with the effective boson model.
4 pages, 3 figures, Phys. Rev. A 77, 043624 (2008)
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Cited by in corpus (6)
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- Supersolid state in fermionic optical lattice systems
- A New Era of Excitonic Insulators
- Multiband superfluidity and superfluid to band-insulator transition of strongly interacting fermions in an optical lattice
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