Properties of low-lying states in a diffusive quantum dot and Fock-space localization

被引：44

作者：

Mejía-Monasterio, C

Richert, J

Rupp, T

Weidenmüller, HA

机构：

[1] Univ Nacl Autonoma Mexico, Lab Cuernavaca, Inst Fis, Cuernavaca 62191, Morelos, Mexico

[2] ULP, Phys Theor Lab, F-67084 Strasbourg, France

[3] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.81.5189

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Motivated by an experiment by Sivan er nl. [Europhys. Lett. 25, 605 (1994)] and by subsequent theoretical work on localization in Fock space, we study numerically a hierarchical model for a finite many-body system of fermions moving in a disordered potential and coupled by a two-body interaction. We focus attention on the low-lying states close to the Fermi energy. Both the spreading width and the participation number depend smoothly on excitation energy. This behavior is in keeping with naive expectations and does not display Anderson localization. We show that the model reproduces essential features of the experiment by Sivan et al. [S0031-9007(98)07906-X].

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页码：5189 / 5192

页数：4

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