Instituto de Ciencia de Materiales de Madrid
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Nonadiabatic electron pumping: Maximal current with minimal noise

Michael Strass, Peter Hänggi, and Sigmund Kohler
Phys. Rev. Lett. 95, 130601 (2005)

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.

[ICMM-CSIC] [Condensed Matter Theory]
last modified: 15.3.2024 by Sigmund Kohler