Quantum stochastic absorption

Joshi, Sandeep K. ; Sahoo, Debendranath ; Jayannavar, A. M. (1999) Quantum stochastic absorption Arxiv-eprints . pp. 1-6.

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Official URL: http://arxiv.org/pdf/cond-mat/9909327v1


We report a detailed and systematic study of wave propagation through a stochastic absorbing random medium. Stochastic absorption is modeled by introducing an attenuation constant per unit length α in the free propagation region of the one-dimensional disordered chain of delta function scatterers. The average value of the logarithm of transmission coefficient decreases linearly with the length of the sample. The localization length is given by ξ = ξwξα/(ξw + ξα), where ξw and ξα are the localization lengths in the presence of only disorder and of only absorption respectively. Absorption does not introduce any additional reflection in the limit of large α , i.e., reflection shows a monotonic decrease with α and tends to zero in the limit of α→∞, in contrast to the behavior observed in case of coherent absorption. The stationary distribution of reflection coefficient agrees well with the analytical results obtained within random phase approximation (RPA) in a larger parameter space. We also emphasize the major differences between the results of stochastic and coherent absorption.

Item Type:Article
Source:Copyright of this article belongs to Arxiv Publications.
ID Code:82866
Deposited On:16 Feb 2012 04:10
Last Modified:18 May 2016 23:55

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