Full counting statistics in electric circuits

Details Full counting statistics in electric circuits Full counting statistics in electric circuits

2003-03-27

arxiv.org/abs/cond-mat/0303590v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

27 pages, 2 figures, contribution to "Quantum Noise", edited by Yu. V. Nazarov and Ya. M. Blanter (Kluwer)

Scientific paper

We review several ways of defining the statistics of charge that is transmitted through an electric circuit, the so-called "counting statistics". We first pursue two approaches that explain the origin of "negative probabilities" that have been found earlier in this context. The first analysis involves degrees of freedom of the electric circuit only. In the second approach an idealized charge detector is introduced. We study then general linear detectors and how their back action on the electric conductor affects the statistics of transferred charge. Phase-coherent conductors in the presence of an electromagnetic environment are studied within a Keldysh action approach.

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