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- Title
FINITE TEMPERATURE PROPERTIES OF OPTICAL LATTICES.
- Authors
Fuxiang Han; Yongmei Zhang
- Abstract
Within a mean-field treatment of the Bose–Hubbard model for an optical lattice, we have derived a self-consistent equation for the order parameter of possible phases in the optical lattice at finite temperatures. From the solutions to the self-consistent equation, we have inferred the temperature dependence of the order parameter and transition temperatures of Mott-insulator and superfluid phases into the normal phase. The condensation fraction in the superfluid phase has been deduced from the one-body density matrix and its temperature dependence has been given. In terms of the normalized correlation function of quasiparticles, strong coherence in the superfluid phase and its loss in Mott-insulator phases are demonstrated.
- Subjects
OPTICS; TEMPERATURE; TRANSITION temperature; SUPERFLUIDITY; CONDENSATION; DENSITY; QUASIPARTICLES; PARTICLES (Nuclear physics)
- Publication
International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics, 2005, Vol 19, Issue 31, p4567
- ISSN
0217-9792
- Publication type
Article
- DOI
10.1142/S0217979205032942