2005/10/31 by M. Boninsegni, N. Prokof'ev, B. Svistunov
Physics and Astronomy · #cond-mat.stat-mech
paper · pdf · doi:10.1103/physrevlett.96.070601
published as Phys. Rev. Lett. 96, 070601 (2006) · Fig. 2 differs from that of published version (includes data for larger system sizes)
arxiv created 2006/02/27 · arxiv updated 2009/12/01
We present a new approach to path integral Monte Carlo (PIMC) simulations based on the worm algorithm, originally developed for lattice models and extended here to continuous-space many-body systems. The scheme allows for efficient computation of thermodynamic properties, including winding numbers and off-diagonal correlations, for systems of much greater size than that accessible to conventional PIMC. As an illustrative application of the method, we simulate the superfluid transition of Helium-four in two dimensions.