Soliton propagation through a disordered system: Statistics of the transmission delay

Sergey A. Gredeskul, Stanislav A. Derevyanko, Alexander S. Kovalev, and Jaroslaw E. Prilepsky
Phys. Rev. E 81, 036608 – Published 30 March 2010

Abstract

We have studied the soliton propagation through a segment containing random pointlike scatterers. In the limit of small concentration of scatterers when the mean distance between the scatterers is larger than the soliton width, a method has been developed for obtaining the statistical characteristics of the soliton transmission through the segment. The method is applicable for any classical particle traversing through a disordered segment with the given velocity transformation after each act of scattering. In the case of weak scattering and relatively short disordered segment the transmission time delay of a fast soliton is mostly determined by the shifts of the soliton center after each act of scattering. For sufficiently long segments the main contribution to the delay is due to the shifts of the amplitude and velocity of a fast soliton after each scatterer. Corresponding crossover lengths for both cases of light and heavy solitons have been obtained. We have also calculated the exact probability density function of the soliton transmission time delay for a sufficiently long segment. In the case of weak identical scatterers the latter is a universal function which depends on a sole parameter—the mean number of scatterers in a segment.

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  • Received 26 October 2009

DOI:https://doi.org/10.1103/PhysRevE.81.036608

©2010 American Physical Society

Authors & Affiliations

Sergey A. Gredeskul1,2, Stanislav A. Derevyanko3, Alexander S. Kovalev4, and Jaroslaw E. Prilepsky3,4

  • 1Department of Physics, Ben Gurion University of Negev, Beer Sheva, Israel
  • 2Nonlinear Physics Center, Australian National University, Canberra, Australia
  • 3Nonlinearity and Complexity Research Group, Aston University, Birmingham, United Kingdom
  • 4B.I. Verkin Institute for Low Temperature Physics and Engineering, NASU, Kharkov, Ukraine

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Issue

Vol. 81, Iss. 3 — March 2010

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