Speaker
Sebastian Gstir
(University of Innsbruck)
Description
In this work we designed and built an integrated waveguide three-path interferometer for measuring so-called higher-order interferences. These hypothetical higher-order interference do not occur in ordinary quantum mechanics or classical electrodynamics and thus the experiment tests the foundations of physics. Mechanical shutters could switch the interferometer arms on and off individually. Our main goal was to avoid cross-talk between the shutter state in a path and the transmissivity or phase in any other path. Using a laser source we were able to measure higher-order interference to an upper bound of $\kappa = 5(6) \cdot 10^{-4}$, normalized to the two-path interference.
Author
Sebastian Gstir
(University of Innsbruck)
Co-authors
Dr
Robert Keil
(Institute for Experimental Physics, University of Innsbruck)
Mr
Thomas Kauten
(Institute for Experimental Physics, University of Innsbruck)
Dr
Toni Eichelkraut
(Institute of Applied Physics, Abbe Center of Photonics)
Prof.
Alexander Szameit
(Institut für Physik, Universität Rostock)
Prof.
Gregor Weihs
(Institute for Experimental Physics, University of Innsbruck)
