Nonadiabatic electron pumping:: Maximal current with minimal noise -: art. no. 130601

被引：69

作者：

Strass, M ^{[1
]}

Hänggi, P ^{[1
]}

Kohler, S ^{[1
]}

机构：

[1] Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.95.130601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The noise properties of pump currents through an open double-quantum-dot setup with nonadiabatic ac driving are investigated. Driving frequencies close to the internal resonances of the double-dot system mark the optimal working points at which the pump current assumes a maximum while its noise power possesses a remarkably low minimum. A rotating-wave approximation provides analytical expressions for the current and its noise power and allows to optimize the noise characteristics. The analytical results are compared to numerical results from a Floquet transport theory.

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页数：4

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