Dynamical Mean Field Theory of the Bose-Hubbard Model
arXiv:cond-mat/9801074 · doi:10.1103/PhysRevLett.80.2189
Abstract
Quantum dynamics of the Bose-Hubbard Model is investigated through a semiclassical hamiltonian picture provided by the Time-Dependent Variational Principle method. The system is studied within a factorized slow/fast dynamics. The semiclassical requantization procedure allows one to account for the strong quantum nature of the system when $t/U\ll 1$. The phase diagram is in good agreement with Quantum Monte Carlo results and third order strong coupling perturbative expansion.
4 pages Revtex, 2 figures .eps, to be published in PRL