A random matrix approach to decoherence

Abstract

In order to analyze the effect of chaos or order on the rate of decoherence in a subsystem, we aim to distinguish effects of the two types of dynamics by choosing initial states as random product states from two factor spaces representing two subsystems. We introduce a random matrix model that permits to vary the coupling strength between the subsystems. The case of strong coupling is analyzed in detail, and we find no significant differences except for very low-dimensional spaces.

11 pages, 5 eps-figures

References in corpus (3)

• On general relation between quantum ergodicity and fidelity of quantum dynamics
• Can quantum chaos enhance stability of quantum computation?
• Integrals of monomials over the orthogonal group

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