期刊
SCIENCE
卷 329, 期 5998, 页码 1500-1503出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1193515
关键词
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资金
- Engineering and Physical Sciences Research Council
- European Research Council
- EU
- Leverhulme Trust
- Centre for Nanoscience and Quantum Information
- Japan Society for the Promotion of Science
- Royal Society
- EPSRC [EP/F008023/1, EP/F010524/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F010524/1, EP/F008023/1] Funding Source: researchfish
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.
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