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Two-colour high-purity Einstein-Podolsky-Rosen photonic state

Author

Listed:
  • Tulio Brito Brasil

    (Niels Bohr Institute, University of Copenhagen)

  • Valeriy Novikov

    (Niels Bohr Institute, University of Copenhagen
    Russian Quantum Center)

  • Hugo Kerdoncuff

    (Danish Fundamental Metrology)

  • Mikael Lassen

    (Danish Fundamental Metrology)

  • Eugene S. Polzik

    (Niels Bohr Institute, University of Copenhagen)

Abstract

We report a high-purity Einstein-Podolsky-Rosen (EPR) state between light modes with the wavelengths separated by more than 200 nm. We demonstrate highly efficient EPR-steering between the modes with the product of conditional variances $${{{{{{{{\mathcal{E}}}}}}}}}^{2}=0.11\pm 0.01\ll 1$$ E 2 = 0.11 ± 0.01 ≪ 1 . The modes display − 7.7 ± 0.5 dB of two-mode squeezing and an overall state purity of 0.63 ± 0.16. EPR-steering is observed over five octaves of sideband frequencies from RF down to audio-band. The demonstrated combination of high state purity, strong quantum correlations, and extended frequency range enables new matter-light quantum protocols.

Suggested Citation

  • Tulio Brito Brasil & Valeriy Novikov & Hugo Kerdoncuff & Mikael Lassen & Eugene S. Polzik, 2022. "Two-colour high-purity Einstein-Podolsky-Rosen photonic state," Nature Communications, Nature, vol. 13(1), pages 1-5, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-32495-7
    DOI: 10.1038/s41467-022-32495-7
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    References listed on IDEAS

    as
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    3. L.-M. Duan & M. D. Lukin & J. I. Cirac & P. Zoller, 2001. "Long-distance quantum communication with atomic ensembles and linear optics," Nature, Nature, vol. 414(6862), pages 413-418, November.
    4. Tobias Gehring & Vitus Händchen & Jörg Duhme & Fabian Furrer & Torsten Franz & Christoph Pacher & Reinhard F. Werner & Roman Schnabel, 2015. "Implementation of continuous-variable quantum key distribution with composable and one-sided-device-independent security against coherent attacks," Nature Communications, Nature, vol. 6(1), pages 1-7, December.
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    Cited by:

    1. Jun Jia & Valeriy Novikov & Tulio Brito Brasil & Emil Zeuthen & Jörg Helge Müller & Eugene S. Polzik, 2023. "Acoustic frequency atomic spin oscillator in the quantum regime," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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