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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik

MP 11: Poster (permanent Di-Do)

MP 11.3: Poster

Dienstag, 1. März 2016, 09:30–18:00, VMP6 HS B

Pointer-based simultaneous measurements of conjugate observables in a thermal environment — •Raoul Heese and Matthias Freyberger — Institut für Quantenphysik, Universität Ulm, D-89069 Ulm, Germany

The simultaneous measurement model of Arthurs and Kelly involves two pointer systems, which are coupled to a quantum system to be measured. Originally, the pointers and the system to be measured are completely isolated from their environment. However, a more realistic treatment has to take environmental effects into consideration. We therefore extend the original model by a thermal heat bath using the Caldeira-Leggett approach, which leads to a Brownian motion of the pointer systems and allows us to observe noise, dissipation, and decoherence effects [1]. As a result, we can discuss the uncertainty of quantum measurements and their inherent transition from quantum to classical in a dynamic way.

[1] R. Heese and M. Freyberger, J. Phys. A 48, 135304 (2015).