title: Quantum walks of correlated photons.
abstract: Quantum walks of correlated particles offer the possibility of studying large-scale quantum interference; simulating biological, chemical, and physical systems; and providing a route to universal quantum computation. We have demonstrated quantum walks of two identical photons in an array of 21 continuously evanescently coupled waveguides in a SiO(x)N(y) chip. We observed quantum correlations, violating a classical limit by 76 standard deviations, and found that the correlations depended critically on the input state of the quantum walk. These results present a powerful approach to achieving quantum walks with correlated particles to encode information in an exponentially larger state space.
authors.affiliation: Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol BS8 1UB, UK.
authors.forename: Alberto
authors.initials: A
authors.lastname: Peruzzo
authors.forename: Mirko
authors.initials: M
authors.lastname: Lobino
authors.forename: Jonathan C F
authors.initials: JC
authors.lastname: Matthews
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Matsuda
authors.forename: Alberto
authors.initials: A
authors.lastname: Politi
authors.forename: Konstantinos
authors.initials: K
authors.lastname: Poulios
authors.forename: Xiao-Qi
authors.initials: XQ
authors.lastname: Zhou
authors.forename: Yoav
authors.initials: Y
authors.lastname: Lahini
authors.forename: Nur
authors.initials: N
authors.lastname: Ismail
authors.forename: Kerstin
authors.initials: K
authors.lastname: Wörhoff
authors.forename: Yaron
authors.initials: Y
authors.lastname: Bromberg
authors.forename: Yaron
authors.initials: Y
authors.lastname: Silberberg
authors.forename: Mark G
authors.initials: MG
authors.lastname: Thompson
authors.forename: Jeremy L
authors.initials: JL
authors.lastname: OBrien