Spin- and charge-density excitations in quantum dots via Quantum Monte Carlo simulation

被引：1

作者：

Colletti, Leonardo

Pederiva, Francesco

Lipparini, Enrico

Umrigar, Cyrus J.

机构：

[1] Ist Nazl Fis Nucl, Grp Coll Trento, I-38050 Trento, Italy

[2] Free Univ Bolzano, Fac Comp Sci, I-39100 Bolzano, Italy

[3] Univ Trent, Dipartimento Fis, I-38050 Trento, Italy

[4] DEMOCRITOS INFM Natl Simulat Ctr, Trieste, Italy

[5] Cornell Univ, Cornell Theory Ctr, Ithaca, NY 14853 USA

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2007年 / 244卷 / 07期

关键词：

D O I：

10.1002/pssb.200674605

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The calculation of the polarizability provides a method of calculating the collective-modes excitation energies of an electronic system. However, the polarizability is a correlated quantity, thus demanding a major effort when Monte Carlo methods are used for its evaluation. Nevertheless, Quantum Monte Carlo results represent the benchmark in most many-body physics. We applied a correlated Variational and Diffusion Monte Carlo scheme to a GaAs-AlGaAs quantum dot. Comparison with Raman scattering experiments and previous calculations is considerable. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：2317 / 2321

页数：5

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