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We introduce two novel quantum Monte Carlo methods and employ them to studythe superfluid-insulator transition in a two-dimensional system of hard-corebosons. One of the methods is appropriate for zero temperature and is basedupon Green's function Monte Carlo; the other is a finite-temperature world-linecluster algorithm. In each case we find that the dynamical exponent isconsistent with the theoretical prediction of $z=2$ by Fisher and co-workers.Comment: Revtex, 10 pages, 3 figures (postscript files attached at end,  separated by  Fig # , where # is 1-3). LA-UR-94-270

Quantum Simulations of the Superfluid-Insulator Transition for Two-Dimensional, Disordered, Hard-Core Bosons