Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 48: Quantum effects: Interference and correlations I
Q 48.2: Talk
Thursday, March 20, 2014, 16:45–17:00, DO26 208
Time multiplexed photonic quantum walks — •Thomas Nitsche1, Andreas Schreiber1,2, Fabian Katzschmann1, Sonja Barkhofen1, Aurél Gábris3, Peter Rohde1, Kaisa Laiho1,2, Martin Štefaňák3, Václav Potoček3, Craig Hamilton3, Igor Jex3, and Christine Silberhorn1 — 1Applied Physics, University of Paderborn, Warburger Str. 100, 33098 Paderborn, Germany — 2Max-Planck-Institute for the Science of Light, Günther-Scharowsky-Str. 1 / Bau 24, 91058 Erlangen, Germany — 3Department of Physics, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Brehova 7, 11519 Praha, Czech Republic
Linear optical networks with a large number of optical modes have been investigated intensively in various theoretical proposals. Most recently their relevance for studies of photonic quantum walk systems has attracted attention, because they can be considered as a standard model to describe the dynamics of quantum particles in a discretized environment and serve as a simulator for other quantum systems, which are not as readily accessible. A key element for a versatile simulator is the ability to dynamically control the quantum-coin, which is the main entity responsible for the evolution of the quantum walk. The utilization of the polarization state as coin state allows for easy manipulation by introducing controlled phase shifts through an electro optic modulator to selectively modify the coin state. This enables us to tune interaction strengths and patterns to simulate different kinds of particles or environments and thus enhancing the abilities of photonic experiments.