Quantum Walks of Correlated Photons

Peruzzo, Alberto; Lobino, Mirko; Matthews, Jonathan C. F.; Matsuda, Nobuyuki; Politi, Alberto; Poulios, Konstantinos; Zhou, Xiaoqi; Lahini, Yoav; Ismail, N.; Wörhoff, Kerstin; Bromberg, Yaron; Silberberg, Yaron; Thompson, Mark G.; O’Brien, Jeremy L.

doi:10.1126/science.1193515

articleScienceSep 16, 2010GREEN OA

Quantum Walks of Correlated Photons

APAlberto Peruzzo MLMirko Lobino JCJonathan C. F. Matthews NMNobuyuki Matsuda APAlberto Politi

University of Bristol · Tohoku Institute of Technology · +3 more institutions

PubMed

Indexed inarxivcrossrefpubmed

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.

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Topics & keywords

Topics

Keywords

Quantum walk
Photon
Physics
Quantum
Statistical physics
Quantum mechanics
Open quantum system
Quantum state

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