Paired state in an integrable spin-1 boson model
arXiv:cond-mat/0610435 · doi:10.1209/0295-5075/79/30005
Abstract
An exactly solvable model describing the low density limit of the spin-1 bosons in a one-dimensional optical lattice is proposed. The exact Bethe ansatz solution shows that the low energy physics of this system is described by a quantum liquid of spin singlet bound pairs. Motivated by the exact results, a mean-field approach to the corresponding three-dimensional system is carried out. Condensation of singlet pairs and coexistence with ordinary Bose-Einstein condensation are predicted.
6 pages, 1 figure, Revised version