Hannover 2013 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 35: Poster I

Q 35.49: Poster

Dienstag, 19. März 2013, 16:00–18:30, Empore Lichthof

König-digraph Interaction Model of Decoherence and Quantum Darwinism — •Nenad Balaneskovic¹, Gernot Alber¹, and Jaroslav Novotny^1,2 — ¹Institut für Angewandte Physik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany — ²Department of Physics, FNSPE, Czech Technical University in Prague, 115 19 Praha 1 - Stare Mesto, Czech Republic

We discuss characteristic properties of pure decoherence and Quantum Darwinism based on qubit-models of open systems interacting with their respective environment by iterated and randomly applied controlled-NOT-type operations. From the analytically determined asymptotic dynamics of the resulting quantum Markov chain the Quantum Darwinistic appearance of Classicality and its connection to König-digraph interaction models of pure decoherence can be investigated.

König-digraph interactions comprise environmental qubits which do not interact among themselves by unitary quantum operations and are thus suitable to physically describe objective quantum measurements performed on an open system by autonomous observers (environmental qubits). König-digraph interactions also account for the most efficient storage of the classical information about a system of interest into its environment. Since the efficiency of the mentioned information storage is also connected with the concept of Quantum Darwinism, we therefore address possible limits of Quantum Darwinism as a valid physical mechanism leading to the appearance of objective reality.