Phys. Rev. Lett. 96, 180603 (2006) [4 pages]Loop Updates for Quantum Monte Carlo Simulations in the Canonical EnsembleReceived 27 July 2005; published 10 May 2006 We present a new nonlocal updating scheme for quantum Monte Carlo simulations, which conserves particle number and other symmetries. It allows exact symmetry projection and direct evaluation of the equal-time Green’s function and other observables in the canonical ensemble. The method is applicable to a wide variety of systems. We show results for bosonic atoms in optical lattices, neutron pairs in atomic nuclei, and electron pairs in ultrasmall superconducting grains. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.180603
DOI:
10.1103/PhysRevLett.96.180603
PACS:
05.10.Ln, 02.70.Ss, 21.60.Ka, 71.10.Li
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