Quantum Monte Carlo study of quasiparticles in the Hubbard model

DOI zum Zitieren dieses Dokuments:: 10.5283/epub.16108

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

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Veröffentlichungsdatum dieses Volltextes: 09 Aug 2010 12:14

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Zusammenfassung

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 ...