Continuous-variable entanglement on a chip

Genta Masada, Kazunori Miyata, Alberto Politi, Toshikazu Hashimoto, Jeremy L. O'Brien, Akira Furusawa*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

66 Citations (Scopus)


Encoding quantum information in continuous variables, as the quadrature of electromagnetic fields, is a powerful approach to quantum information science and technology. Continuous-variable entanglement (light beams in Einstein-Podolsky-Rosen, or EPR, states) is a key resource for quantum information protocols and enables hybridization between continuous-variable and single-photon discrete-variable qubit systems. However, continuous-variable systems are currently limited by their implementation in free-space optical networks, and the demand for increased complexity, low loss, high-precision alignment and stability, as well as hybridization, require an alternative approach. Here we present an integrated photonic implementation of the key capabilities for continuous-variable quantum technologies - the generation and characterization of EPR beams in a photonic chip. When combined with integrated squeezing and non-Gaussian operations, these results will open the way to universal quantum information processing with light.

Original languageEnglish
Pages (from-to)316-319
Number of pages4
JournalNature Photonics
Issue number5
Publication statusPublished - 30 May 2015

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  • Projects

    Programme Grant: Engineering Photonic Quantum Technologies.

    Rarity, J. G., O'Brien, J. L., Thompson, M. G., Erven, C., Sahin, D., Marshall, G. D., Barreto, J., Jiang, P., Mccutcheon, W. D., Silverstone, J. W., Sinclair, G. F., Kling, L., Banerjee, A., Wang, J., Santagati, R., Borghi, M., Woodland, E. M., Mawdsley, H. C. M. & Faruque, I. I.


    Project: Research, Parent

    Fabricating a photonic quantum computer.

    O'Brien, J. L.


    Project: Research

    Cite this

    Masada, G., Miyata, K., Politi, A., Hashimoto, T., O'Brien, J. L., & Furusawa, A. (2015). Continuous-variable entanglement on a chip. Nature Photonics, 9(5), 316-319.