Berlin 2015 – wissenschaftliches Programm

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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik

MP 17: Poster (permanent Di-Do)

MP 17.2: Poster

Dienstag, 17. März 2015, 09:30–18:00, HFT-FT 101

Entropic uncertainty relation for open pointer-based simultaneous measurements — •Raoul Heese and Matthias Freyberger — Institut für Quantenphysik, Universität Ulm, D-89069 Ulm, Germany

Uncertainty relations for simultaneous measurements of conjugate observables date back to the theory of Arthurs and Kelly, who considered a model of two pointer systems, which are coupled to a quantum system to be measured and act as the measurement apparatus. We extend this classic model by including a thermal environment in which the pointers behave as coupled particles under Brownian motion. Additionally, we use information entropy to determine the measurement accuracy. This novel approach leads us to a new kind of entropic uncertainty relation for so-called open pointer-based simultaneous measurements of conjugate observables.