Darmstadt 2008 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 29: Poster Quanteneffekte

Q 29.17: Poster

Tuesday, March 11, 2008, 16:30–19:00, Poster C2

Simultaneous measurements in quantum optics — •Michael Bußhardt and Matthias Freyberger — Institut für Quantenphysik, Universität Ulm, 89069 Ulm, Germany

Various possibilities for simultaneous measurements of conjugate variables in the optical domain are investigated. Here, for example, the quadratures of the electromagnetic field do not commute and therefore cannot be precisely measured simultaneously. Possible setups, necessary for measuring such non-commuting observables simultaneously by allowing the system to interact with certain classes of ruler systems, are reviewed and discussed. The question arises, which states of the ruler systems are optimal to gain specific information about the investigated system. This leads to generalized versions of the Heisenberg uncertainty relation.