Asymmetric Quantum Shot Noise in Quantum Dots

Details Asymmetric Quantum Shot Noise in Quantum Dots Asymmetric Quantum Shot Noise in Quantum Dots

2003-12-03

arxiv.org/abs/cond-mat/0312107v1

Phys. Rev. Lett. 93, 136602 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.93.136602

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 function of frequency shows steps and becomes super-Poissonian. This provides experimental access to the quantum fluctuations of the current. We present an exact calculation 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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