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Quantum Walks of Correlated Photon Pairs in Two-Dimensional Waveguide Arrays

Poulios, Konstantinos; Keil, Robert; Fry, Daniel; D. A. Meinecke, Jasmin; C. F. Matthews, Jonathan; Politi, Alberto; Lobino, Mirko; Gr�fe, Markus; Heinrich, Matthias; Nolte, Stefan; Szameit, Alexander; L. O'Brien, Jeremy

Authors

Konstantinos Poulios

Robert Keil

Daniel Fry

Jasmin D. A. Meinecke

Jonathan C. F. Matthews

Alberto Politi

Mirko Lobino

Markus Gr�fe

Matthias Heinrich

Stefan Nolte

Alexander Szameit

Jeremy L. O'Brien



Abstract

We demonstrate quantum walks of correlated photons in a 2D network of directly laser written waveguides coupled in a 'swiss cross' arrangement. The correlated detection events show high-visibility quantum interference and unique composite behaviour: strong correlation and independence of the quantum walkers, between and within the planes of the cross. Violations of a classically defined inequality, for photons injected in the same plane and in orthogonal planes, reveal non-classical behaviour in a non-planar structure.

Citation

Poulios, K., Keil, R., Fry, D., D. A. Meinecke, J., C. F. Matthews, J., Politi, A., …L. O'Brien, J. (2014). Quantum Walks of Correlated Photon Pairs in Two-Dimensional Waveguide Arrays. Physical Review Letters, 112(14), Article 143604. https://doi.org/10.1103/PhysRevLett.112.143604

Journal Article Type Article
Publication Date Apr 11, 2014
Deposit Date Sep 23, 2019
Publicly Available Date Mar 29, 2024
Journal Physical Review Letters
Print ISSN 0031-9007
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 112
Issue 14
Article Number 143604
DOI https://doi.org/10.1103/PhysRevLett.112.143604
Keywords Quantum Physics
Public URL https://nottingham-repository.worktribe.com/output/2465709
Publisher URL https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.112.143604

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