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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics II

Q 31.46: Poster

Dienstag, 24. März 2015, 17:00–19:00, C/Foyer

Koenig-Digraph Interaction (KDI) Model of Decoherence, Dissipation and Quantum Darwinism (QD) based on Random Unitary Operations (RUO) — •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 QD when pure decoherence is disturbed by dissipation. Based on digraph interaction models of open qubit systems interacting with their respective environment by iterated and randomly applied (controlled-NOT-type) unitary operations (RUO), we introduce a unitary two-qubit dissipation operator into our RUO-digraph interaction model of pure decoherence. We investigate the QD-appearance of Classicality from the analytically determined asymptotic dynamics of the resulting quantum Markov chain.

In addition, we concentrate on KDIs which comprise environmental qubits that 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). In particular, we 1) investigate whether it is possible to achieve the most efficient storage of classical information about a system into its environment by altering the strength parameter of the dissipation operator and 2) discuss the structure of the corresponding dissipative attractor space of our extended RUO qubit-model of QD.