Mesoscopic Fluctuations of Adiabatic Charge Pumping in Quantum Dots

Abstract

We consider the adiabatic charge transport through zero-dimensional mesoscopic sample (quantum dot) caused by two periodically changing external perturbations. Both the magnitude and the sign of the transmitted charge are extremely sensitive to the configuration of the dot and to the magnetic field. We find the correlation function characterizing the random value of this pumped charge for arbitrary strength of the perturbation. In contrast to previous theoretical and experimental claims, the charge is found not to have any symmetry with respect to the inversion of magnetic field. At strong pumping perturbation, the variance of the charge $<Q^2>$ is found to be proportional to the length of the contour in parametric space.

11 pages, 5 figures included

References in corpus (1)

• An Adiabatic Quantum Electron Pump

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