Fuzzy Greenberger–Horne–Zeilinger state analyzer and multiparty measurement-device-independent quantum key distribution network

Zhang, Litao; Hu, Min; Pan, Ruikun; Zeng, Hanyu; Li, Jun; Guo, Banghong

doi:10.1117/1.oe.58.1.016113

Cited by 1 publication

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“…With the development of quantum networks [ 8 , 9 , 10 ], multi-user scenarios have become research hotspots. Multi-user QKD, known as quantum cryptography conference (QCC) such as Greenberger–Horne–Zeilinger (GHZ) states [ 11 ] based scheme [ 12 ] and measurement-device independent scheme [ 13 ] or quantum conference key agreement (CKA) such as the intensity-encoded scheme [ 14 ] and the scheme based on a W-class state [ 15 ], is effective in scenarios where multiple users share common secure keys. Multi-particle entangled states can easily apply in multi-user QKD realization [ 16 ], although the communication distance is limited by the stability of entangled states and other issues lead to such schemes being inferior compared to the existing single-photon interference schemes [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Multi-User Measurement-Device-Independent Quantum Key Distribution Based on GHZ Entangled State

Hua

Guo

2022

Entropy

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As a multi-particle entangled state, the Greenberger–Horne–Zeilinger (GHZ) state plays an important role in quantum theory and applications. In this study, we propose a flexible multi-user measurement-device-independent quantum key distribution (MDI-QKD) scheme based on a GHZ entangled state. Our scheme can distribute quantum keys among multiple users while being resistant to detection attacks. Our simulation results show that the secure distance between each user and the measurement device can reach more than 280 km while reducing the complexity of the quantum network. Additionally, we propose a method to expand our scheme to a multi-node with multi-user network, which can further enhance the communication distance between the users at different nodes.

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