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Q: Fachverband Quantenoptik und Photonik
Q 30: Poster II
Q 30.55: Poster
Tuesday, March 3, 2009, 16:30–19:00, VMP 9 Poster
Asymptotic dynamics of random unitary channels — •Jaroslav Novotny1,2, Gernot Alber2, and Igor Jex1 — 1Department of Physics, FJFI CVUT, Prague, Czech Republic — 2Institut für Angewandte Physik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
We investigate random unitary channels and their asymptotic dynamics under repeated application. It is demonstrated that, despite the fact that random unitary channels are typically not normal, their asymptotic dynamics are determined completely by their eigenspaces associated with eigenvalues of unit modulus. We also investigate first implications of this general result for the asymptotic dynamics of quantum networks consisting of arbitrary numbers of qubits which are coupled by randomly applied controlled-not operations.