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Anomalous transmission and drifts in one-dimensional Lévy structures

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  • Bernabó, P.
  • Burioni, R.
  • Lepri, S.
  • Vezzani, A.

Abstract

We study the transmission of random walkers through a finite-size inhomogeneous material with a quenched, long-range correlated distribution of scatterers. We focus on a finite one-dimensional structure where walkers undergo random collisions with a subset of sites distributed on deterministic (Cantor-like) or random positions, with Lévy spaced distances. Using scaling arguments, we consider stationary and time-dependent transmission and we provide predictions on the scaling behavior of particle current as a function of the sample size. We show that, even in absence of bias, for each single realization a non-zero drift can be present, due to the intrinsic asymmetry of each specific arrangement of the scattering sites. For finite systems, this average drift is particularly important for characterizing the transmission properties of individual samples. The predictions are tested against the numerical solution of the associated master equation. A comparison of different boundary conditions is given.

Suggested Citation

  • Bernabó, P. & Burioni, R. & Lepri, S. & Vezzani, A., 2014. "Anomalous transmission and drifts in one-dimensional Lévy structures," Chaos, Solitons & Fractals, Elsevier, vol. 67(C), pages 11-19.
    • Handle: RePEc:eee:chsofr:v:67:y:2014:i:c:p:11-19
    DOI: 10.1016/j.chaos.2014.06.002
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    References listed on IDEAS

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    1. Klafter, J. & Blumen, A. & Zumofen, G. & Shlesinger, M.F., 1990. "Lévy walk approach to anomalous diffusion," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 168(1), pages 637-645.
    2. Baronchelli, Andrea & Radicchi, Filippo, 2013. "Lévy flights in human behavior and cognition," Chaos, Solitons & Fractals, Elsevier, vol. 56(C), pages 101-105.
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