Quantum walks of correlated particles

Details Quantum walks of correlated particles Quantum walks of correlated particles

2010-06-24

arxiv.org/abs/1006.4764v1

Science, 329(5998):1500-1503, 2010

Physics

Quantum Physics

Scientific paper

10.1126/science.1193515

Quantum walks of correlated particles offer the possibility to study large-scale quantum interference, simulate biological, chemical and physical systems, and a route to universal quantum computation. Here we demonstrate quantum walks of two identical photons in an array of 21 continuously evanescently-coupled waveguides in a SiOxNy chip. We observe quantum correlations, violating a classical limit by 76 standard deviations, and find that they depend critically on the input state of the quantum walk. These results open the way to a powerful approach to quantum walks using correlated particles to encode information in an exponentially larger state space.

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