Department of Physics2024-11-0920101050-294710.1103/PhysRevA.82.0556012-s2.0-78649573261https://hdl.handle.net/20.500.14288/3642The 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.pdfPhysicsJournal Article1094-1622https://doi.org/10.1103/PhysRevA.82.055601284140200005Q1NOIR00028