Counting statistics for mesoscopic conductors with internal degrees of freedom

Details Counting statistics for mesoscopic conductors with internal degrees of freedom Counting statistics for mesoscopic conductors with internal degrees of freedom

Publishing date

2010-04-29

URL

arxiv.org/abs/1004.5298v1

Journals

Phys. Rev. Lett. 105, 026801 (2010)

Science

Physics

Field

Condensed Matter

SubField

Mesoscale and Nanoscale Physics

Additional info

4 pages, 2 figures

Type

Scientific paper

Digital Object Identifier

10.1103/PhysRevLett.105.026801

Abstract

We consider the transport of electrons passing through a mesoscopic device possessing internal dynamical quantum degrees of freedom. The mutual interaction between the system and the conduction electrons contributes to the current fluctuations, which we describe in terms of full counting statistics. We identify conditions where this discriminates coherent from incoherent internal dynamics, and also identify and illustrate conditions under which the device acts to dynamically bunch transmitted or reflected electrons, thereby generating super-Poissonian noise.

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