Generation of Complex Quantum States via Integrated Frequency Combs

Christian Reimer1, Michael Kues1,2, Piotr Roztocki1, Benjamin Wetzel1,3, Brent E. Little4, Sai T. Chu5, Lucia Caspani6, David J. Moss7 and Roberto Morandotti1,8,a
1INRS-EMT, 1650 Boulevard Lionel-Boulet, Varennes, Quebec J3X 1S2, Canada
2School of Engineering, University of Glasgow, Rankine, Building, Oakfield Avenue, Glasgow G12 8LT, UK
3Department of Physics and Astronomy, University of Sussex, Falmer, Brighton BN1 9QH, UK
4State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China
55City University of Hong Kong, Department of Physics and Material Science, Tat Chee Avenue, Hong Kong, China
6Institute of Photonics, Department of Physics, University of Strathclyde, Glasgow G4 0NW, UK
7Center for Micro-Photonics, Swinburne University of Technology, Hawthorne, Victoria 3122, Australia
8Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China.


The generation of optical quantum states on an integrated platform will enable low cost and accessible advances for quantum technologies such as secure communications and quantum computation. We demonstrate that integrated quantum frequency combs (based on high-Q microring resonators made from a CMOS- compatible, high refractive-index glass platform) can enable, among others, the generation of heralded single photons, cross-polarized photon pairs, as well as bi- and multiphoton entangled qubit states over a broad frequency comb covering the S, C, L telecommunications band, constituting an important cornerstone for future practical implementations of photonic quantum information processing.

Keywords: Quantum optics, Integrated optics devices, Nonlinear optics, Four-wave mixing.

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