Abstract
Bosonic atoms trapped in an optical lattice at very low temperatures can be modeled by the Bose-Hubbard model. In this paper, we propose a slave-boson approach for dealing with the Bose-Hubbard model, which enables us to analytically describe the physics of this model at nonzero temperatures. With our approach the phase diagram for this model at nonzero temperatures can be quantified.
- Received 23 June 2003
DOI:https://doi.org/10.1103/PhysRevA.68.043623
©2003 American Physical Society