Quantum Monte Carlo study of quasiparticles in the Hubbard model

W. von der Linden, I. Morgenstern, H. de Raedt

Research output: Contribution to journalArticleResearchpeer-review

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 in the Hubbard model in one dimension and resolve the controversy concerning the discontinuity in the momentum distribution function between recent quantum Monte Carlo and weak-coupling renormalization-group techniques.
Original languageEnglish
Pages (from-to)4669
Number of pages1
JournalPhysical Review / B
Volume41
Issue number7
DOIs
Publication statusPublished - 1990

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Hubbard model
Ground state
Distribution functions
Momentum
Monte Carlo methods
projectors
Monte Carlo method
discontinuity
distribution functions
momentum
ground state
approximation
energy

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Quantum Monte Carlo study of quasiparticles in the Hubbard model. / von der Linden, W.; Morgenstern, I.; de Raedt, H.

In: Physical Review / B, Vol. 41, No. 7, 1990, p. 4669.

Research output: Contribution to journalArticleResearchpeer-review

von der Linden, W. ; Morgenstern, I. ; de Raedt, H. / Quantum Monte Carlo study of quasiparticles in the Hubbard model. In: Physical Review / B. 1990 ; Vol. 41, No. 7. pp. 4669.
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