Nonadiabatic Electron Pumping: Maximal Current with Minimal Noise

  • The noise properties of pump currents through an open double quantum dot setup with non-adiabatic 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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Author:Michael StrassGND, Peter HänggiORCiDGND, Sigmund KohlerORCiDGND
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Publishing Institution:Universität Augsburg
Release Date:2006/09/01
Tag:mesoscopic systems; random noise; semiconductor quantum dots
GND-Keyword:Rauschen; Quantenpunkt; Halbleiter; Floquet-Theorie; Mesoskopisches System
Source:erschienen in: Phys. Rev. Lett. 95, 130601 (2005); DOI: 10.1103/PhysRevLett.95.130601; URL:
Institutes:Mathematisch-Naturwissenschaftlich-Technische Fakultät
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Theoretische Physik I
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik