Phys. Rev. E 78, 056707 (2008) [10 pages]Directed update for the stochastic Green function algorithmReceived 9 June 2008; revised 12 August 2008; published 24 November 2008 In a recent paper we presented a stochastic Green function (SGF) algorithm, which has the properties of being general and easy to apply to any lattice Hamiltonian of the form Ĥ=V̂−T̂, where V̂ is diagonal in the chosen occupation number basis and T̂ has only positive matrix elements. We propose here a modified version of the update scheme that keeps the simplicity and generality of the original SGF algorithm, and significantly enhances its efficiency. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevE.78.056707
DOI:
10.1103/PhysRevE.78.056707
PACS:
02.70.Uu, 05.30.Jp
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