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Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 39: Poster: Quantum Optics and Photonics II

Q 39.3: Poster

Tuesday, March 6, 2018, 16:15–18:15, Zelt Ost

Time multiplexed photonic quantum walks with 4D coins — •Lennart Lorz1, Sonja Barkhofen1, Evan Meyer-Scott1, Thomas Nitsche1, Václav Potocek2, Igor Jex2, and Christine Silberhorn11Applied Physics, University of Paderborn, Warburger Strasse 100, 33098 Paderborn, Germany — 2Department of Physics, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Brehová 7, 115 19 Praha, Czech Republic

Discrete time quantum walks, realized in time multiplexed architecture, are an established tool to experimentally study quantum transport phenomena. We implemented a photonic quantum walk on a looped Michelson interferometer in contrast to the standard Mach-Zehnder setup to investigate the benefits of a new interferometric geometry. By exploiting the two different traveling directions in the loop in addition to the two possible polarizations of the walker we establish a four dimensional coin space for one spatial dimension. A new key feature is the possibility to implement a quantum walk on a circle allowing for the experimental simulation of dynamics with periodic boundary conditions. We will present our new setup, its theoretical modeling, experimental results and future applications.

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