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Continuous-variable entanglement on a chip

Research output: Contribution to journalArticle

  • Genta Masada
  • Kazunori Miyata
  • Alberto Politi
  • Toshikazu Hashimoto
  • Jeremy L. O'Brien
  • Akira Furusawa
Original languageEnglish
Pages (from-to)316-319
Number of pages4
JournalNature Photonics
Volume9
Issue number5
DOIs
DatePublished - 30 May 2015

Abstract

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.

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