Nonalgebraic length dependence of transmission through a chain of barriers with a Levy spacing distribution

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dc.creatorBeenakker, C. W. J.
dc.creatorGroth, C. W.
dc.creatorAkhmerov, A. R.
dc.date2008-11-03
dc.date2009-01-06
dc.date.accessioned2026-07-07T12:35:04Z
dc.date.available2026-07-07T12:35:04Z
dc.descriptionThe recent realization of a "Levy glass" (a three-dimensional optical material with a Levy distribution of scattering lengths) has motivated us to analyze its one-dimensional analogue: A linear chain of barriers with independent spacings s that are Levy distributed: p(s)~1/s^(1+alpha) for s to infinity. The average spacing diverges for 0<alpha<1. A random walk along such a sparse chain is not a Levy walk because of the strong correlations of subsequent step sizes. We calculate all moments of conductance (or transmission), in the regime of incoherent sequential tunneling through the barriers. The average transmission from one barrier to a point at a distance L scales as L^(-alpha) ln L for 0<alpha<1. The corresponding electronic shot noise has a Fano factor (average noise power / average conductance) that approaches 1/3 very slowly, with 1/ln L corrections.
dc.description5 pages, 2 figures; introduction expanded, references added
dc.identifierhttps://arxiv.org/abs/0811.0297
dc.identifierhttp://arxiv.org/abs/0811.0297
dc.identifierPhys. Rev. B 79, 024204 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.024204
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/217656
dc.subjectDisordered Systems and Neural Networks
dc.titleNonalgebraic length dependence of transmission through a chain of barriers with a Levy spacing distribution
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