Coherent one-way quantum conference key agreement based on twin field

Abstract

Quantum conference key agreement (CKA) enables key sharing among multiple trusted users with information-theoretic security. Currently, the key rates of most quantum CKA protocols suffer from the limit of the total efficiency among quantum channels. Inspired by the coherent one-way and twin-field quantum key distribution (QKD) protocols, we propose a quantum CKA protocol of three users. Exploiting coherent states with intensity 0 and $\mu$ to encode logic bits, our protocol can break the limit. Additionally, the requirements of phase randomization and multiple intensity modulation are removed in our protocol, making its experimental demonstration simple.

arXiv comment6 pages, 4 figures

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Cited by in corpus (18)

• Conference key agreement in a quantum network
• Secure Anonymous Conferencing in Quantum Networks
• Long-distance twin-field quantum key distribution with entangled sources
• Finite-key Analysis for Quantum Conference Key Agreement with Asymmetric Channels
• Scalable High-Rate Twin-Field Quantum Key Distribution Networks without Constraint of Probability and Intensity
• Breaking universal limitations on quantum conference key agreement without quantum memory
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• Overcoming fundamental bounds on quantum conference key agreement
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• Impact of imperfect measurements on multi-party quantum key distribution
• Experimental Phase-Matching Quantum Cryptographic Conferencing in Symmetric and Asymmetric Fiber Channels