Feshbach resonance in optical lattices and the quantum Ising model.

@article{Bhaseen2009FeshbachRI,
  title={Feshbach resonance in optical lattices and the quantum Ising model.},
  author={M. J. Bhaseen and A. O. Silver and Martin Hohenadler and Benjamin D. Simons},
  journal={Physical review letters},
  year={2009},
  volume={103 26},
  pages={
          265302
        }
}
Motivated by experiments on heteronuclear Feshbach resonances in Bose mixtures, we investigate s-wave pairing of two species of bosons in an optical lattice. The zero temperature phase diagram supports a rich array of superfluid and Mott phases and a network of quantum critical points. This topology reveals an underlying structure that is succinctly captured by a two-component Landau theory. Within the second Mott lobe we establish a quantum phase transition described by the paradigmatic… 

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