Mean-field theory for the Mott insulator-paired superfluid transition in the two-species Bose-Hubbard model

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

References in corpus (9)

• Many-Body Physics with Ultracold Gases
• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Double species condensate with tunable interspecies interactions
• Degenerate Bose-Bose mixture in a three-dimensional optical lattice
• Superfluidity of Interacting Bosonic Mixtures in Optical Lattices
• Condensate fraction in a 2D Bose gas measured across the Mott-insulator transition
• Pair-supersolid phase in a bilayer system of dipolar lattice bosons
• Mott-insulator phases of non-locally coupled 1D dipolar Bose gases
• Strong-coupling expansion for the two-species Bose-Hubbard model

Cited by in corpus (3)

• Quantum phases of constrained dipolar bosons in coupled one-dimensional optical lattices
• High-order symbolic strong-coupling expansion for the Bose-Hubbard model
• Out-of-Equilibrium Dynamics in the Two-Component Bose-Hubbard Model