Statistical model of dephasing in mesoscopic devices introduced in the scattering matrix formalism

Details Statistical model of dephasing in mesoscopic devices introduced in the scattering matrix formalism Statistical model of dephasing in mesoscopic devices introduced in the scattering matrix formalism

2003-12-18

arxiv.org/abs/cond-mat/0312478v2

Phys. Rev. B 69, 235304 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 6 figures

Scientific paper

10.1103/PhysRevB.69.235304

We propose a phenomenological model of dephasing in mesoscopic transport, based on the introduction of random phase fluctuations in the computation of the scattering matrix of the system. A Monte Carlo averaging procedure allows us to extract electrical and microscopic device properties. We show that, in this picture, scattering matrix properties enforced by current conservation and time reversal invariance still hold. In order to assess the validity of the proposed approach, we present simulations of conductance and magnetoconductance of Aharonov-Bohm rings that reproduce the behavior observed in experiments, in particular as far as aspects related to decoherence are concerned.

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