Dresden 2011 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 15: Poster 1: Quanteninformation, Quanteneffekte, Laserentwicklung, Laseranwendungen, Ultrakurze Pulse, Photonik

Q 15.82: Poster

Montag, 14. März 2011, 16:30–19:30, P1

Time-Continuous Measurements and Non-Markovian Open Quantum Systems — •Sven Krönke and Walter T. Strunz — Institut für Theoretische Physik, TU Dresden, Zellescher Weg 17, 01069 Dresden

Both Markovian and non-Markovian open quantum systems can be described by means of Monte Carlo methods: The reduced density operator of the open system can be obtained by averaging over many solutions of a stochastic Schrödinger equation. In the Markovian case, where the environment has no memory at all, it is moreover possible to really generate those solutions in an experiment by time-continuously monitoring the environment (e.g. by homo-/heterodyne detection). This offers the possibility to non-demolition measurements: By observing many identical copies of the system and averaging over the measurement outcomes, the influence of the measurements on the open system dynamics is removed.

This contribution deals with the question whether or not it is feasible to find such measurement schemes even in the non-Markovian regime, where the coupling between the system and its environment is not necessarily small and the environment has a finite memory.