Loop updates for quantum Monte Carlo simulations in the canonical ensemble

被引：33
|
作者：
Rombouts, S. M. A. [1 ]
Van Houcke, K. [1 ]
Pollet, L. [1 ]
机构：
[1] Univ Ghent, Vakgrp Subatom Stralingsfys, B-9000 Ghent, Belgium
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 18期
关键词：
D O I：
10.1103/PhysRevLett.96.180603
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present a new nonlocal updating scheme for quantum Monte Carlo simulations, which conserves particle number and other symmetries. It allows exact symmetry projection and direct evaluation of the equal-time Green's function and other observables in the canonical ensemble. The method is applicable to a wide variety of systems. We show results for bosonic atoms in optical lattices, neutron pairs in atomic nuclei, and electron pairs in ultrasmall superconducting grains.
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页数：4
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