Collège Doctoral - Doktorandenkollegien

Statistical Physics of Complex Systems

Coventry - Leipzig - Lviv - Nancy

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Quantum decoherence (1)
Francesco Petruccione
petruccione AT ukzn DOT ac DOT za
University of KwaZulu-Natal
le Wednesday 17 October 2007 à 09h00
Salle de séminaire du groupe de Physique Statistique
Decoherence denotes the environment-induced, dynamical destruction of quantum coherence. It leads to a dynamical selection of a distinguished set of pure states of the open system and counteracts the superposition principle in the Hilbert space of the open system. We will start with a general discussion of the dynamical structure which leads to ideal environment-induced decoherence, that is to the destruction of quantum coherence without damping. Basic concepts, such as dynamical selection of a preferred basis, decoherence time, and the emergence of coherent subspaces will be illustrated with the help of an analytically solvable example.


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