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 SiOxNy 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.
Quantum walks of correlated photons / Peruzzo, A.; Lobino, M.; Matthews, J. C. F.; Matsuda, N.; Politi, A.; Poulios, K.; Zhou, X. -Q.; Lahini, Y.; Ismail, N.; Worhoff, K.; Bromberg, Y.; Silberberg, Y.; Thompson, M. G.; Obrien, J. L.. - In: SCIENCE. - ISSN 0036-8075. - 329:5998(2010), pp. 1500-1503. [10.1126/science.1193515]
Quantum walks of correlated photons
Lobino M.;
2010-01-01
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 SiOxNy 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
