About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Physical Review B
Paper
Quantum Monte Carlo study of quasiparticles in the Hubbard model
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. © 1990 The American Physical Society.