| Issue |
EPL
Volume 79, Number 3, August 2007
|
|
|---|---|---|
| Article Number | 30005 | |
| Number of page(s) | 6 | |
| Section | General | |
| DOI | https://doi.org/10.1209/0295-5075/79/30005 | |
| Published online | 18 July 2007 | |
Paired state in an integrable spin-1 boson model
1
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences Beijing 100080, PRC
2
International Center for Quantum Structures, Chinese Academy of Sciences - Beijing 100080, PRC
Received:
12
April
2007
Accepted:
20
June
2007
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.
PACS: 05.30.Jp – Boson systems / 03.75.Hh – Static properties of condensates; thermodynamical, statistical, and structural properties / 03.75.Kk – Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow
© Europhysics Letters Association, 2007
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