Mean-field theory for the Mott insulator-paired superfluid transition in the two-species Bose-Hubbard model
arXiv:1010.2688 · doi:10.1103/PhysRevA.82.055601
Abstract
The standard mean-field theory for the Mott insulator-superfluid phase transition is not sufficient to describe the Mott insulator-paired superfluid phase transition. Therefore, by restricting the two-species Bose-Hubbard Hamiltonian to the subspace of paired particles, and using perturbation theory, here we derive an analytic mean-field expression for the Mott insulator-paired superfluid transition boundary.
3 pages with 2 figures