Qubit entanglement between ring-resonator photon-pair sources on a silicon chip
Silverstone, J.W. and Santagati, R. and Bonneau, D. and Strain, M.J. and Sorel, M. and O'Brien, J.L. and Thompson, M.G. (2015) Qubit entanglement between ring-resonator photon-pair sources on a silicon chip. Nature Communications, 6. 7948. ISSN 2041-1723
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Abstract
Entanglement - one of the most delicate phenomena in nature - is an essential resource for quantum information applications. Scalable photonic quantum devices must generate and control qubit entanglement on-chip, where quantum information is naturally encoded in photon path. Here we report a silicon photonic chip that uses resonant-enhanced photon-pair sources, spectral demultiplexers and reconfigurable optics to generate a path-entangled two-qubit state and analyse its entanglement. We show that ring-resonator-based spontaneous four-wave mixing photon-pair sources can be made highly indistinguishable and that their spectral correlations are small. We use on-chip frequency demultiplexers and reconfigurable optics to perform both quantum state tomography and the strict Bell-CHSH test, both of which confirm a high level of on-chip entanglement. This work demonstrates the integration of high-performance components that will be essential for building quantum devices and systems to harness photonic entanglement on the large scale.
Creators(s): |
Silverstone, J.W., Santagati, R., Bonneau, D., Strain, M.J. ![]() | Item type: | Article |
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ID code: | 54322 |
Keywords: | quantum entanglement, quantum information science, photonic chips, pulsed pump laser, Physics, Electrical engineering. Electronics Nuclear engineering, Biochemistry, Genetics and Molecular Biology(all), Chemistry(all), Physics and Astronomy(all) |
Subjects: | Science > Physics Technology > Electrical engineering. Electronics Nuclear engineering |
Department: | Faculty of Science > Physics > Institute of Photonics |
Depositing user: | Pure Administrator |
Date deposited: | 21 Sep 2015 13:19 |
Last modified: | 13 Jan 2021 01:58 |
Related URLs: | |
URI: | https://strathprints.strath.ac.uk/id/eprint/54322 |
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