Quantum Monte Carlo study of quasiparticles in the Hubbard model

DOI to cite this document:: 10.5283/epub.16108

Von der Linden, Wolfgang ; Morgenstern, Ingo ; Raedt, H. de

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Date of publication of this fulltext: 09 Aug 2010 12:14

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Abstract

We present an improved version of the projector quantum Monte Carlo method, which has recently been proposed by Sorella et al. This scheme allows a very precise computation of the ground-state energy of fermionic models. The ‘‘minus sign’’ has been treated without further approximations and does not influence the accuracy. In this paper we focus on the question of the existence of quasiparticles ...