Stuttgart 2012 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 56: SYPC: From Atoms to Photonic Circuits 3
Q 56.7: Vortrag
Freitag, 16. März 2012, 12:00–12:15, V47.02
Quantum Simulations with a two-dimensional Quantum Walk — •Andreas Schreiber1,2, Aurél Gábris3, Peter P. Rohde1,4, Kaisa Laiho1, Martin Štefaňák3, Václav Potoček3, Craig Hamilton3, Igor Jex3, and Christine Silberhorn1,2 — 1IQO Group, MPI for the Science of Light,91058 Erlangen, Germany. — 2Integrated Quantum Optics, Applied Physics, University of Paderborn, 33098 Paderborn, Germany — 3Department of Physics, FNSPE, Czech Technical University in Prague, Praha, Czech Republic. — 4Centre for Engineered Quantum Systems, Department of Physics and Astronomy, Macquarie University, Sydney NSW 2113, Australia
The concept of quantum walks has become a promising candidate for quantum computation and simulations of quantum transfer. Although theoretical models already exploit the power of higher-dimensional quantum walks all experimental implementations so far were limited to a spread in a single dimension.
Here we present the first implementation of a quantum walk in a scalable and flexible two-dimensional system. We demonstrate a highly coherent evolution of photons in an optical fiber network, allowing for a spread over up to 169 positions after 12 steps. Having full control over the quantum coin enables us to simulate entanglement in bipartite systems with conditioned interactions including non-linearities or two-particle scattering.