We demonstrate quantum walks of correlated photons in a two-dimensional network of directly laser written waveguides coupled in a "swiss cross" arrangement. The correlated detection events show high-visibility quantum interference and unique composite behavior: 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 nonclassical behavior in a nonplanar structure. © 2014 American Physical Society.
Quantum walks of correlated photon pairs in two-dimensional waveguide arrays / Poulios, K.; Keil, R.; Fry, D.; Meinecke, J. D. A.; Matthews, J. C. F.; Politi, A.; Lobino, M.; Grafe, M.; Heinrich, M.; Nolte, S.; Szameit, A.; O'Brien, J. L.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 112:14(2014). [10.1103/PhysRevLett.112.143604]
Quantum walks of correlated photon pairs in two-dimensional waveguide arrays
Lobino M.;
2014-01-01
Abstract
We demonstrate quantum walks of correlated photons in a two-dimensional network of directly laser written waveguides coupled in a "swiss cross" arrangement. The correlated detection events show high-visibility quantum interference and unique composite behavior: 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 nonclassical behavior in a nonplanar structure. © 2014 American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
