Quantum Monte Carlo simulations for the Bose-Hubbard model with random chemical potential; localized Bose-Einstein condensation without superfluidity
Statistical Mechanics
2009-03-17 v1
Abstract
The hardcore-Bose-Hubbard model with random chemical potential is investigated using quantum Monte Carlo simulation. We consider two cases of random distribution of the chemical potential: a uniformly random distribution and a correlated distribution. The temperature dependences of the superfluid density, the specific heat, and the correlation functions are calculated. If the distribution of the randomness is correlated, there exists an intermediate state, which can be thought of as a localized condensate state of bosons, between the superfluid state and the normal state.
Keywords
Cite
@article{arxiv.0903.2537,
title = {Quantum Monte Carlo simulations for the Bose-Hubbard model with random chemical potential; localized Bose-Einstein condensation without superfluidity},
author = {Mitsuaki Tsukamoto and Makoto Tsubota},
journal= {arXiv preprint arXiv:0903.2537},
year = {2009}
}
Comments
4 pages, 7 figures