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- W2067174468 abstract "We study the zero-temperature phase transition of a two-dimensional disordered boson Hubbard model. The phase diagram is constructed in terms of the disorder strength and the chemical potential. Via Monte Carlo simulations, we find a multicritical line separating the weak-disorder regime, where the Mott-insulator-to-superfluid transition occurs, from the strong-disorder regime, where the Bose-glass-to-superfluid transition occurs. On the multicritical line, the insulator-to-superfluid transition has the dynamical critical exponent z = 1.35+/-0.05 and the correlation length critical exponent nu = 0.67+/-0.03. We suggest that the proliferation of the particle-hole pairs screens out the weak-disorder effects." @default.
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- W2067174468 date "2001-11-26" @default.
- W2067174468 modified "2023-09-27" @default.
- W2067174468 title "Phase Diagram of a Disordered Boson Hubbard Model in Two Dimensions" @default.
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- W2067174468 doi "https://doi.org/10.1103/physrevlett.87.247006" @default.
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