Hannover 2010 – wissenschaftliches Programm

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SYDC: Symposium Decoherence in the light of modern experiments

SYDC 1: Decoherence in the Light of Modern Experiments I

SYDC 1.1: Hauptvortrag

Dienstag, 9. März 2010, 14:00–14:30, E 415

Environment-induced Decoherence of Quantum States: An Introduction — •Heinz-Peter Breuer — Physikalisches Institut, Universität Freiburg, Hermann-Herder-Str. 3, D-79104 Freiburg, Germany

Realistic quantum mechanical systems are influenced through the coupling to an environment which contains a large number of mostly uncontrollable degrees of freedom. The interaction of an open quantum systems with its environment leads to the mechanisms of damping and dissipation, and to a strong and often rapid loss of quantum coherence. The talk gives an introduction into the theory of the decoherence of quantum states. With the help of simple system-environment models the basic features of the decoherence dynamics in open quantum systems are discussed, and some standard techniques for the determination of decoherence time scales will be explained, as well as the emergence of pointer states and decoherence-free subspaces.