Asymmetric Quantum Shot Noise in Quantum Dots

Hans-Andreas Engel and Daniel Loss
Phys. Rev. Lett. 93, 136602 – Published 22 September 2004

Abstract

We analyze the frequency-dependent noise of a current through a quantum dot which is coupled to Fermi leads and which is in the Coulomb blockade regime. We show that the asymmetric shot noise, as a function of detection frequency, shows steps and becomes super-Poissonian. This provides experimental access to the quantum fluctuations of the current. We present an exact calculation of the noise for a single dot level and a perturbative evaluation of the noise in Born approximation (sequential tunneling regime but without Markov approximation) for the general case of many levels with charging interaction.

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  • Received 3 December 2003

DOI:https://doi.org/10.1103/PhysRevLett.93.136602

©2004 American Physical Society

Authors & Affiliations

Hans-Andreas Engel and Daniel Loss

  • Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland

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Issue

Vol. 93, Iss. 13 — 24 September 2004

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