Dual quantum Monte Carlo algorithm for hardcore bosons

被引:2
作者
Batrouni, GG [1 ]
Mabilat, H [1 ]
机构
[1] Univ Nice, Inst Nonlineaire Nice, F-06560 Valbonne, France
关键词
D O I
10.1016/S0010-4655(99)00384-7
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
We derive the exact dual representation of the bosonic Hubbard model which takes the form of conserved current loops. The hardcore limit, which corresponds to the quantum spin-1/2 Heisenberg antiferromagnet, is also obtained. In this limit, the dual partition function takes a particularly simple form which is very amenable to numerical simulations. In addition to the usual quantities that we can measure (energy, density-density correlation function and superfluid density) we can with this new algorithm measure efficiently for the first time the order parameter correlation function, [a(i)n(j)(dagger)], \i - j\ greater than or equal to 1. We demonstrate this with numerical tests in one dimension. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:468 / 476
页数:9
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