Reweighting Method for Quantum Monte Carlo Simulations with the Negative-Sign Problem

Tota Nakamura, Hidetoshi Nishimori, Naomichi Hatano

研究成果: Article査読

17 被引用数 (Scopus)

抄録

We propose a new method for quantum Monte Carlo simulations with the negative-sign problem. In the conventional method, one simulates a virtual system whose Boltzmann factors are the absolute values of the original one, and analyzes the data so that the correct expression for physical quantities may be recovered. We simulate a different virtual system with properties closer to the original system and yet without the negative-sign problem. Comparison between the present method and the conventional one is made for the antiferromagnetic Heisenberg model on the 4 x 4 square lattice with frustrations (J1-J2 model). We conclude that the present method is useful in the low-temperature region where the negative-sign problem becomes serious. It is also shown that the method is considerably efficient on the point that quantities for different parameters can be obtained in a single run.

本文言語English
ページ(範囲)3494-3502
ページ数9
ジャーナルjournal of the physical society of japan
61
10
DOI
出版ステータスPublished - 1992 1
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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