Fluctuations in an established transmission in the presence of a complex environment

Abstract

In various situations where wave transport is preeminent, like in wireless communication, a strong established transmission is present in a complex scattering environment. We develop a novel approach to describe emerging fluctuations, which combines a transmitting channel and a chaotic background in a unified effective Hamiltonian. Modeling such a background by random matrix theory, we derive exact non-perturbative results for both transmission and reflection distributions at arbitrary absorption that is typically present in real systems. Remarkably, in such a complex scattering situation, the transport is governed by only two parameters: an absorption rate and the ratio of the so-called spreading width to the natural width of the transmission line. In particular, we find that the established transmission disappears sharply when this ratio exceeds unity. The approach exemplifies the role of the chaotic background in dephasing the deterministic scattering.

10 pages 5 figures (typos fixed, improved presentation, references updated)

References in corpus (5)

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• Statistics of off-diagonal entries of Wigner $K$-matrix for chaotic wave systems with absorption
• Statistics of a simple transmission mode on a lossy chaotic background
• Envelope and phase distribution of a resonance transmission through a complex environment
• Fluctuations and correlations in scattering on a resonance coupled to a chaotic background
• Time Domain Generalization of the Random Coupling Model and Experimental Verification in a Complex Scattering System
• Diffuse field cross-correlations: scattering theory and electromagnetic experiments
• Scarring in open chaotic systems: The local density of states