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Superfluid-insulator transition in the disordered two-dimensional Bose-Hubbard model
We investigate the superfluid-insulator transition in the disordered two-dimensional Bose-Hubbard model through quantum Monte Carlo simulations. The Bose-Hubbard model is studied in the presence of site disorder and the quantum critical point between the Bose-glass and superfluid is determined in both the grand canonical ($\mu/U=0.375$ close to $\rho=1$) and canonical …