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Proceedings Paper

Modeling the effects of dephasing on mesoscopic noise
Author(s): Marco G. Pala; Giuseppe Iannaccone; Massimo Macucci; Giovanni Marola
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Paper Abstract

We present simulations of the effects of dephasing on the shot noise properties of mesoscopic coherent devices, such as chaotic cavities and Aharonov-Bohm rings. We adopt a phenomenological model that exploits the statistical nature of the dephasing mechanism and is able to cover the intermediate regime between a fully coherent and completely incoherent (i.e., semiclassical) transport. By investigating conductance and noise properties as a function of the dephasing length, we conclude that decoherence has no specific effect on shot noise which can be distinguished from the one it has on conductance. In addition, when a large number of conducting channels is considered, semiclassical and quantum behavior must converge, yielding as a consequence the independence of DC and noise properties from dephasing.

Paper Details

Date Published: 25 May 2004
PDF: 9 pages
Proc. SPIE 5472, Noise and Information in Nanoelectronics, Sensors, and Standards II, (25 May 2004); doi: 10.1117/12.548604
Show Author Affiliations
Marco G. Pala, Univ. degli Studi di Pisa (Italy)
Giuseppe Iannaccone, Univ. degli Studi di Pisa (Italy)
IEITT-CNR (Italy)
Massimo Macucci, Univ. degli Studi di Pisa (Italy)
IEITT-CNR (Italy)
Giovanni Marola, Univ. degli Studi di Pisa (Italy)


Published in SPIE Proceedings Vol. 5472:
Noise and Information in Nanoelectronics, Sensors, and Standards II
Janusz M. Smulko; Yaroslav Blanter; Mark I. Dykman; Laszlo B. Kish, Editor(s)

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