Loop updates for quantum Monte Carlo simulations in the canonical ensemble

被引：34

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.

引用

页数：4

共 39 条

[1]

ALCI G, 2002, PHYS REV B, V65

[2] Simulations of discrete quantum systems in continuous Euclidean time [J].

Beard, BB ;

Wiese, UJ .

PHYSICAL REVIEW LETTERS, 1996, 77 (25) :5130-5133

[3]

Brink D. M., 2005, NUCL SUPERFLUIDITY P

[4] Microscopic simulations in physics [J].

Ceperley, DM .

REVIEWS OF MODERN PHYSICS, 1999, 71 (02) :S438-S443

[5] Monte Carlo computation of pair correlations in excited nuclei [J].

Cerf, NJ .

PHYSICAL REVIEW LETTERS, 1996, 76 (14) :2420-2423

[6] Pairing in nuclear systems: from neutron stars to finite nuclei [J].

Dean, DJ ;

Hjorth-Jensen, M .

REVIEWS OF MODERN PHYSICS, 2003, 75 (02) :607-656

[7] Density matrix renormalization group study of ultrasmall superconducting grains [J].

Dukelsky, J ;

Sierra, G .

PHYSICAL REVIEW LETTERS, 1999, 83 (01) :172-175

[8] The loop algorithm [J].

Evertz, HG .

ADVANCES IN PHYSICS, 2003, 52 (01) :1-66

[9] CLUSTER ALGORITHM FOR VERTEX MODELS [J].

EVERTZ, HG ;

LANA, G ;

MARCU, M .

PHYSICAL REVIEW LETTERS, 1993, 70 (07) :875-879

[10]

FISHER MPA, 1989, PHYS REV B, V40, P546, DOI [10.1103/PhysRevB.40.546, 10.1063/1.38820]

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