title: Einstein-Podolsky-Rosen spatial entanglement in ordered and anderson photonic lattices.
abstract: We demonstrate quantum walks of a photon pair in a spatially extended Einstein-Podolsky-Rosen state coupled into an on-chip multiport photonic lattice. By varying the degree of entanglement we observe Anderson localization for pairs in a separable state and Anderson colocalization for pairs in an Einstein-Podolsky-Rosen entangled state. In the former case, each photon localizes independently, while in the latter neither photon localizes, but the pair colocalizes--revealing unexpected survival of the spatial correlations through strong disorder.
authors.affiliation: CREOL, The College of Optics & Photonics, University of Central Florida, Orlando, Florida 32816, USA and School of Science and Technology, University of Camerino, 62032 Camerino, Macerata, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Di Giuseppe
authors.affiliation: CREOL, The College of Optics & Photonics, University of Central Florida, Orlando, Florida 32816, USA.
authors.forename: L
authors.initials: L
authors.lastname: Martin
authors.affiliation: CREOL, The College of Optics & Photonics, University of Central Florida, Orlando, Florida 32816, USA and Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Perez-Leija
authors.affiliation: Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Keil
authors.affiliation: Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Dreisow
authors.affiliation: Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Nolte
authors.affiliation: Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Szameit
authors.affiliation: CREOL, The College of Optics & Photonics, University of Central Florida, Orlando, Florida 32816, USA.
authors.forename: A F
authors.initials: AF
authors.lastname: Abouraddy
authors.affiliation: CREOL, The College of Optics & Photonics, University of Central Florida, Orlando, Florida 32816, USA.
authors.forename: D N
authors.initials: DN
authors.lastname: Christodoulides
authors.affiliation: CREOL, The College of Optics & Photonics, University of Central Florida, Orlando, Florida 32816, USA.
authors.forename: B E A
authors.initials: BE
authors.lastname: Saleh