Time scales in the dynamics of an interacting quantum dot

被引：55

作者：

Contreras-Pulido, L. Debora ^{[1
]}

Splettstoesser, Janine ^{[1
]}

Governale, Michele ^{[2
,3
]}

Koenig, Juergen ^{[4
]}

Buettiker, Markus ^{[5
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Theorie Stat Phys, D-52056 Aachen, Germany

[2] Victoria Univ Wellington, Sch Phys & Chem Sci, Wellington 6140, New Zealand

[3] Victoria Univ Wellington, MacDiarmid Inst Adv Mat & Nanotechnol, Wellington 6140, New Zealand

[4] Univ Duisburg Essen, Theoret Phys & CeNIDE, D-47048 Duisburg, Germany

[5] Univ Geneva, Dept Phys Theor, CH-1211 Geneva 4, Switzerland

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 07期

基金：

瑞士国家科学基金会;

关键词：

ZERO-BIAS ANOMALIES; TRANSPORT; CIRCUIT;

D O I：

10.1103/PhysRevB.85.075301

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We analyze the dynamics of a single-level quantum dot with Coulomb interaction, weakly tunnel coupled to an electronic reservoir, after it has been brought out of equilibrium, e.g., by a step-pulse potential. We investigate the exponential decay toward the equilibrium state, which is governed by three time scales. In addition to the charge and spin relaxation time there is a third time scale which is independent of the level position and the Coulomb interaction. This time scale emerges in the time evolution of physical quantities sensitive to two-particle processes.

引用

页数：11

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