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Secure quantum remote state preparation of squeezed microwave states

Author

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  • S. Pogorzalek

    (Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften
    Technische Universität München)

  • K. G. Fedorov

    (Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften
    Technische Universität München)

  • M. Xu

    (Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften
    Technische Universität München)

  • A. Parra-Rodriguez

    (University of the Basque Country UPV/EHU)

  • M. Sanz

    (University of the Basque Country UPV/EHU)

  • M. Fischer

    (Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften
    Technische Universität München
    Munich Center for Quantum Science and Technology (MCQST))

  • E. Xie

    (Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften
    Technische Universität München
    Munich Center for Quantum Science and Technology (MCQST))

  • K. Inomata

    (RIKEN Center for Emergent Matter Science (CEMS)
    National Institute of Advanced Industrial Science and Technology)

  • Y. Nakamura

    (RIKEN Center for Emergent Matter Science (CEMS)
    The University of Tokyo)

  • E. Solano

    (University of the Basque Country UPV/EHU
    IKERBASQUE, Basque Foundation for Science
    Shanghai University)

  • A. Marx

    (Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften)

  • F. Deppe

    (Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften
    Technische Universität München
    Munich Center for Quantum Science and Technology (MCQST))

  • R. Gross

    (Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften
    Technische Universität München
    Munich Center for Quantum Science and Technology (MCQST))

Abstract

Quantum communication protocols based on nonclassical correlations can be more efficient than known classical methods and offer intrinsic security over direct state transfer. In particular, remote state preparation aims at the creation of a desired and known quantum state at a remote location using classical communication and quantum entanglement. We present an experimental realization of deterministic continuous-variable remote state preparation in the microwave regime over a distance of 35 cm. By employing propagating two-mode squeezed microwave states and feedforward, we achieve the remote preparation of squeezed states with up to 1.6 dB of squeezing below the vacuum level. Finally, security of remote state preparation is investigated by using the concept of the one-time pad and measuring the von Neumann entropies. We find nearly identical values for the entropy of the remotely prepared state and the respective conditional entropy given the classically communicated information and, thus, demonstrate close-to-perfect security.

Suggested Citation

  • S. Pogorzalek & K. G. Fedorov & M. Xu & A. Parra-Rodriguez & M. Sanz & M. Fischer & E. Xie & K. Inomata & Y. Nakamura & E. Solano & A. Marx & F. Deppe & R. Gross, 2019. "Secure quantum remote state preparation of squeezed microwave states," Nature Communications, Nature, vol. 10(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10727-7
    DOI: 10.1038/s41467-019-10727-7
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    Cited by:

    1. Florian Fesquet & Fabian Kronowetter & Michael Renger & Wun Kwan Yam & Simon Gandorfer & Kunihiro Inomata & Yasunobu Nakamura & Achim Marx & Rudolf Gross & Kirill G. Fedorov, 2024. "Demonstration of microwave single-shot quantum key distribution," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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