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Q: Fachverband Quantenoptik und Photonik

Q 30: Poster II

Q 30.52: Poster

Dienstag, 3. März 2009, 16:30–19:00, VMP 9 Poster

Role of entanglement in open system dynamics — •Ansgar Pernice and Walter Strunz — Institut für Theoretische Physik, TU Dresden

When two previously independent quantum systems interact, the total state will almost always become entangled. We expect this to be true also for "open" quantum systems that interact weakly with their "heat baths": system and environment become entangled. Nevertheless, it is interesting to note that the usual description of (Markovian) open quantum system dynamics in quantum optics, solid state or chemical physics rests on an assumption of separability of the total state. Moreover, most instances of decoherence -- despite the usual parlance that it results from entanglement -- may perfectly be understood without entanglement. In this project we want to investigate in more detail the role of system-environment entanglement in quantum optical and solid state devices, where the heat bath is provided by either light or phonon modes. The influence of temperature and the nature of the presumably oberserved entanglement (bound or free) will be of particular interest.