Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 33: Quantum Information (Concepts and Methods) III

Q 33.3: Talk

Tuesday, March 6, 2018, 14:45–15:00, K 1.019

Amplified measurement of a mode function’s rotation — •Sabrina Hartmann, Joachim Fischbach, and Matthias Freyberger — Institut für Quantenphysik, Universität Ulm, D-89069 Ulm

We present a complete quantum optical description of a Mach-Zehnder interferometer, including a Dove prism, which is rotated by a small angle compared to the plane of incidence [1]. The Dove prism changes polarization and rotates the mode function in one arm of the interferometer. Subsequently, by post-selecting photons at the output via polarization we identify an amplification of the mode function’s rotation. This has been explained by the weak value formalism. We show, however, that this explanation is limited to a certain set of parameters. Furthermore, we evaluate the interferometric setup for several non-classical states and hence, determine conditions to obtain the above mentioned effect. The amplification of the mode function’s rotation can also be observed in the second order correlation function.

O.S. Magaña-Loaiza et al., Physica Scripta, 92, 023001 (2016).