Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2009-03-14
Physics
Condensed Matter
Statistical Mechanics
4 pages, 7 figures
Scientific paper
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.
Tsubota Makoto
Tsukamoto Mitsuaki
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