Quantum walks of correlated photons.
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.
Peruzzo
Alberto
A
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.
Lobino
Mirko
M
Matthews
Jonathan C F
JC
Matsuda
Nobuyuki
N
Politi
Alberto
A
Poulios
Konstantinos
K
Zhou
Xiao-Qi
XQ
Lahini
Yoav
Y
Ismail
Nur
N
Wörhoff
Kerstin
K
Bromberg
Yaron
Y
Silberberg
Yaron
Y
Thompson
Mark G
MG
OBrien
Jeremy L
JL