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Demonstration of microwave single-shot quantum key distribution

Physics

Demonstration of microwave single-shot quantum key distribution

F. Fesquet, F. Kronowetter, et al.

This groundbreaking research by Florian Fesquet, Fabian Kronowetter, Michael Renger, and colleagues showcases an innovative continuous-variable quantum key distribution protocol utilizing squeezed microwave states. Demonstrating unconditional security and the potential for secure communication over impressive distances, this study paves the way for microwave quantum communication technology.

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Playback language: English
Abstract
This paper presents an experimental realization of a continuous-variable quantum key distribution (QKD) protocol using propagating displaced squeezed microwave states. Superconducting parametric devices are used for state generation and single-shot quadrature detection. Unconditional security is demonstrated, improved by adding trusted noise. Feasibility is shown for secure microwave quantum communication using current technology in both open-air (up to ~80 m) and cryogenic (over 1000 m) conditions.
Publisher
Nature Communications
Published On
Aug 30, 2024
Authors
Florian Fesquet, Fabian Kronowetter, Michael Renger, Wun Kwan Yam, Simon Gandorfer, Kunihiro Inomata, Yasunobu Nakamura, Achim Marx, Rudolf Gross, Kirill G. Fedorov
Tags
quantum key distribution
squeezed states
microwave communication
unconditional security
superconducting devices
quantum communication
trusted noise

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