Transmission delay times of localized waves

Details Transmission delay times of localized waves Transmission delay times of localized waves

2001-03-05

arxiv.org/abs/cond-mat/0103113v1

Phys. Rev. E 64, 026606 (2001)

Physics

Condensed Matter

Disordered Systems and Neural Networks

9 pages, 4 figures

Scientific paper

10.1103/PhysRevE.64.026606

We investigate the effects of wave localization on the delay time tau (frequency sensitivity of the scattering phase shift) of a wave transmitted through a disordered wave guide. Localization results in a separation tau=chi+chi' of the delay time into two independent but equivalent contributions, associated to the left and right end of the wave guide. For N=1 propagating modes, chi and chi' are identical to half the reflection delay time of each end of the wave guide. In this case the distribution function P(tau) in an ensemble of random disorder can be obtained analytically. For $N>1$ propagating modes the distribution function can be approximated by a simple heuristic modification of the single-channel problem. We find a strong correlation between channels with long reflection delay times and the dominant transmission channel.

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