Twin-field-based multi-party quantum key agreement

• URL: http://arxiv.org/abs/2409.04204v1
• Date: Fri, 6 Sep 2024 11:51:10 GMT
• Title: Twin-field-based multi-party quantum key agreement
• Authors: Venkat Abhignan, R. Srikanth,
• Abstract summary: We study a method to extend the twin-field key distribution protocol to a scheme for multi-party quantum key agreement. We derive the key rate based on the entanglement-based source-replacement scheme.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum key distribution (QKD) can secure cryptographic communication between two distant users, as guaranteed by the laws of quantum mechanics rather than computational assumptions. The twin-field scheme, which employs counter-propagated weak coherent light pulses, doubles the secure distance of standard QKD without using quantum repeaters. Here, we study a method to extend the twin-field key distribution protocol to a scheme for multi-party quantum key agreement. We study our protocol's security using a minimum error discrimination analysis and derive the asymptotic key rate based on the entanglement-based source-replacement scheme. We also simulate it on the ANSYS Interconnect platform to study the protocol's performance in certain practical situations.

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