Stuttgart 2012 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 67: Quanteneffekte: Verschränkung und Dekohärenz 2
Q 67.2: Talk
Friday, March 16, 2012, 14:15–14:30, V7.01
A macroscopicity measure from a minimal modification of quantum time evolution — •Stefan Nimmrichter1 and Klaus Hornberger2 — 1University of Vienna, Vienna Center for Quantum Science and Technology (VCQ), Boltzmanngasse 5, 1090 Vienna, Austria — 2University of Duisburg-Essen, Faculty of Physics, Lotharstraße 1, 47048 Duisburg, Germany
We formulate an experimentally accessible measure for the degree of macroscopicity of quantum states. It is based on a minimally invasive modification of the quantum time evolution, which is still compatible with basic principles such as conservation of probabilities, Galileian covariance, particle exchange symmetry and scale invariance. This way different quantum experiments can be compared by assessing the extent to which they exclude such a modification.