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 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.
- Publication:
-
Science
- Pub Date:
- September 2010
- DOI:
- 10.1126/science.1193515
- arXiv:
- arXiv:1006.4764
- Bibcode:
- 2010Sci...329.1500P
- Keywords:
-
- PHYSICS;
- Quantum Physics;
- Physics - Optics
- E-Print:
- Science, 329(5998):1500-1503, 2010