期刊
NATURE COMMUNICATIONS
卷 4, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms2349
关键词
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资金
- EPSRC [EP/C51933/01, EP/J008052/1, EP/C013956/1]
- EC project Q-ESSENCE [248095]
- Royal Society
- AFOSR EOARD
- Australian Research Council's Federation Fellow program [FF0668810]
- Centre for Engineered Quantum Systems [CE110001013]
- Centre for Quantum Computation and Communication Technology [CE110001027]
- United States Air Force Institute of Technology
- EC Marie Curie Fellowships [PIIF-GA-2011-300820, PIEF-GA-2010-275103]
- FASTQUAST ITN Marie Curie fellowship
- Engineering and Physical Sciences Research Council [EP/H03031X/1, EP/E036066/1, EP/J008052/1, EP/C013956/1] Funding Source: researchfish
- EPSRC [EP/E036066/1, EP/H03031X/1] Funding Source: UKRI
Increasing the complexity of quantum photonic devices is essential for many optical information processing applications to reach a regime beyond what can be classically simulated, and integrated photonics has emerged as a leading platform for achieving this. Here we demonstrate three-photon quantum operation of an integrated device containing three coupled interferometers, eight spatial modes and many classical and nonclassical interferences. This represents a critical advance over previous complexities and the first on-chip nonclassical interference with more than two photonic inputs. We introduce a new scheme to verify quantum behaviour, using classically characterised device elements and hierarchies of photon correlation functions. We accurately predict the device's quantum behaviour and show operation inconsistent with both classical and bi-separable quantum models. Such methods for verifying multiphoton quantum behaviour are vital for achieving increased circuit complexity. Our experiment paves the way for the next generation of integrated photonic quantum simulation and computing devices.
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