Superfluid-insulator transition in commensurate disordered bosonic systems: large-scale worm algorithm simulations.

@article{Prokofev2004SuperfluidinsulatorTI,
  title={Superfluid-insulator transition in commensurate disordered bosonic systems: large-scale worm algorithm simulations.},
  author={Nikolay V Prokof'ev and Boris V. Svistunov},
  journal={Physical review letters},
  year={2004},
  volume={92 1},
  pages={015703}
}
We report results of large-scale Monte Carlo simulations of superfluid-insulator transitions in disordered commensurate 2D bosonic systems. In the off-diagonal disorder case, we find that the transition is to a gapless incompressible insulator, and its dynamical critical exponent is z=1.5(2). In the diagonal-disorder case, we prove the conjecture that rare statistical fluctuations are inseparable from critical fluctuations on the largest scales and ultimately result in crossover to the generic… CONTINUE READING

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