Current and current fluctuations in quantum shuttles

Details Current and current fluctuations in quantum shuttles Current and current fluctuations in quantum shuttles

2004-11-08

arxiv.org/abs/cond-mat/0411190v1

Phys. Fluids 17, 100613 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Minireview; technical level aimed at general audience, based on an invited talk at "Transport Phenomena in Micro and Nanodevic

Scientific paper

10.1063/1.1949207

We review the properties of electron shuttles, i.e. nanoelectromechanical devices that transport electrons one-by-one by utilizing a combination of electronic and mechanical degrees of freedom. We focus on the extreme quantum limit, where the mechanical motion is quantized. We introduce the main theoretical tools needed for the analysis, e.g. generalized master equations and Wigner functions, and we outline the methods how the resulting large numerical problems can be handled. Illustrative results are given for current, noise, and full counting statistics for a number of model systems. Throughout the review we focus on the physics behind the various approximations, and some simple examples are given to illustrate the theoretical concepts. We also comment on the experimental situation.

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