Quantum Monte Carlo Loop Algorithm for the t-J Model

Details Quantum Monte Carlo Loop Algorithm for the t-J Model Quantum Monte Carlo Loop Algorithm for the t-J Model

1997-11-04

arxiv.org/abs/cond-mat/9711022v1

Phys. Rev. B 58, 4304 (1998)

Physics

Condensed Matter

Strongly Correlated Electrons

22 pages, including 12 figures. RevTex v3.0, uses psf.tex

Scientific paper

10.1103/PhysRevB.58.4304

We propose a generalization of the Quantum Monte Carlo loop algorithm to the t-J model by a mapping to three coupled six-vertex models. The autocorrelation times are reduced by orders of magnitude compared to the conventional local algorithms. The method is completely ergodic and can be formulated directly in continuous time. We introduce improved estimators for simulations with a local sign problem. Some first results of finite temperature simulations are presented for a t-J chain, a frustrated Heisenberg chain, and t-J ladder models.

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