Wave Transport in disordered waveguides: closed channel contributions and the coherent and diffuse fields

TL;DR

This paper investigates wave transport in disordered waveguides, revealing that coherent fields relate to direct processes while diffuse intensities dominate overall transmission and reflection, based on numerical analysis.

Contribution

It provides a numerical study distinguishing the roles of coherent and diffuse fields in wave transport through disordered waveguides.

Findings

Coherent fields are relevant only for direct processes.

Transmittance and reflectance are dominated by diffuse intensities.

Numerical results highlight the importance of statistical fluctuations.

Abstract

We study the wave transport through a disordered system inside a waveguide. The expectation value of the complex reflection and transmission coefficients (the coherent fields) as well as the transmittance and reflectance are obtained numerically. The numerical results show that the averages of the coherent fields are only relevant for direct processes, while the transmittance and reflectance are mainly dominated by the diffuse intensities, which come from the statistical fluctuations of the fields.