Fully connected twin-field quantum key distribution network

• URL: http://arxiv.org/abs/2504.15137v1
• Date: Mon, 21 Apr 2025 14:39:59 GMT
• Title: Fully connected twin-field quantum key distribution network
• Authors: Chunfeng Huang, Rui Guan, Xin Liu, Shizhuo Li, Wenjie He, Hao Liang, Ziyang Luo, Zhenrong Zhang, Wei Li, Kejin Wei,
• Abstract summary: Quantum key distribution (QKD) is a key application in quantum communication, enabling secure key exchange between parties using quantum states.<n>We propose and demonstrate a fully connected TF-QKD network architecture, where users prepare quantum signals and send them to network nodes.<n>A proof-of-principle demonstration with three users successfully achieved secure key sharing over simulated link losses of up to 30 dB, with an average rate of $5.01 times 10-7$ bit per pulse.
• Score: 14.846406513309322
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Quantum key distribution (QKD) is a key application in quantum communication, enabling secure key exchange between parties using quantum states. Twin-field (TF) QKD offers a promising solution that surpasses the repeaterless limits, and its measurement-device-independent nature makes it suitable for star-type network architectures. In this work, we propose and demonstrate a fully connected TF-QKD network architecture, where users prepare quantum signals and send them to network nodes. These nodes use splitters to route the signals to measurement units, enabling secure key distribution among arbitrary users. A proof-of-principle demonstration with three users successfully achieved secure key sharing over simulated link losses of up to 30 dB, with an average rate of $5.01 \times 10^{-7}$ bit per pulse. Additionally, simulations show that the architecture can support up to $32$ users with a secure key rate of 280.90 bits/s under typical fiber loss conditions. This approach represents a significant advancement in the topology of untrusted-node QKD networks and holds promise for practical, large-scale applications in secure communication.

Related papers

• Hybrid Implementation for Untrusted-node-based Quantum Key Distribution Network [16.242325482656927]
  Quantum key distribution (QKD) serves as a cornerstone of secure quantum communication.<n>We present a hybrid system that seamlessly integrates TF-QKD and MDI-QKD into one untrusted-node-based architecture.<n> Experiments demonstrate secure finite-size key rates for sending-or-not-sending QKD and MDI-QKD over fiber distances of 150 to 431 km.
  arXiv  Detail & Related papers  (2025-03-07T02:27:41Z)
• A measurement-device-independent quantum key distribution network using optical frequency comb [2.87085365395994]
  Quantum key distribution (QKD) promises secure key exchange between two remote parties.<n>We propose and experimentally demonstrate a fully connected multi-user QKD network based on a wavelength-multiplexed measurement-device-independent (MDI) QKD protocol.
  arXiv  Detail & Related papers  (2025-02-17T14:52:22Z)
• Practical hybrid PQC-QKD protocols with enhanced security and performance [44.8840598334124]
  We develop hybrid protocols by which QKD and PQC inter-operate within a joint quantum-classical network. In particular, we consider different hybrid designs that may offer enhanced speed and/or security over the individual performance of either approach.
  arXiv  Detail & Related papers  (2024-11-02T00:02:01Z)
• Towards efficient and secure quantum-classical communication networks [47.27205216718476]
  There are two primary approaches to achieving quantum-resistant security: quantum key distribution (QKD) and post-quantum cryptography (PQC) We introduce the pros and cons of these protocols and explore how they can be combined to achieve a higher level of security and/or improved performance in key distribution. We hope our discussion inspires further research into the design of hybrid cryptographic protocols for quantum-classical communication networks.
  arXiv  Detail & Related papers  (2024-11-01T23:36:19Z)
• Guarantees on the structure of experimental quantum networks [105.13377158844727]
  Quantum networks connect and supply a large number of nodes with multi-party quantum resources for secure communication, networked quantum computing and distributed sensing. As these networks grow in size, certification tools will be required to answer questions regarding their properties. We demonstrate a general method to guarantee that certain correlations cannot be generated in a given quantum network.
  arXiv  Detail & Related papers  (2024-03-04T19:00:00Z)
• Continuous-variable quantum passive optical network [0.0]
  We propose continuous-variable quantum passive-optical-network (CV-QPON) protocols, enabling deterministic and simultaneous secret key generation among all network users. We show two protocols with different trust levels assigned to the network users and experimentally demonstrate key generation in a quantum access network with 8 users.
  arXiv  Detail & Related papers  (2024-02-25T09:56:56Z)
• A cost-efficient quantum access network with qubit-based synchronization [10.503263803759602]
  We propose a cost-efficient quantum access network (QAN) that uses qubit-based synchronization. We successfully achieved average secure key rates of $53.84$ kbps and $71.90$ kbps for each user over a 50-km commercial fiber spool. Our work provides a feasible and cost-effective way to implement a multi-user QKD network, further promoting the widespread application of QKD.
  arXiv  Detail & Related papers  (2023-08-28T08:03:21Z)
• A round-trip multi-band quantum access network [5.894846988315471]
  We propose an expandable and cost-effective quantum access network, in which the round-trip structure makes quantum states travel in a circle to carry the information. We realize multi-user secure key sharing through the continuous-variable QKD (CV-QKD) protocol. The results show that each user can achieve excess noise suppression and 600 bps level secure key generation under 30 km standard fiber transmission.
  arXiv  Detail & Related papers  (2023-05-10T06:14:13Z)
• High-rate continuous-variable measurement device-independent quantum key distribution with finite-size security [0.0]
  Continuous-variable (CV) measurement-device-independent (MDI) QKD is a promising candidate for creating various quantum network topologies. Here, we report the first experimental validation of a CV MDI-QKD system, achieving a secure key rate of 2.6 Mbit/s against collective attacks.
  arXiv  Detail & Related papers  (2023-03-02T22:20:29Z)
• Quantum Key Distribution Using a Quantum Emitter in Hexagonal Boron Nitride [48.97025221755422]
  We demonstrate a room temperature, discrete-variable quantum key distribution system using a bright single photon source in hexagonal-boron nitride. We have generated keys with one million bits length, and demonstrated a secret key of approximately 70,000 bits, at a quantum bit error rate of 6%. Our work demonstrates the first proof of concept finite-key BB84 QKD system realised with hBN defects.
  arXiv  Detail & Related papers  (2023-02-13T09:38:51Z)
• Path-encoded high-dimensional quantum communication over a 2 km multicore fiber [50.591267188664666]
  We demonstrate the reliable transmission over a 2 km long multicore fiber of path-encoded high-dimensional quantum states. A stable interferometric detection is guaranteed, allowing for low error rates and the generation of 6.3 Mbit/s of secret key rate.
  arXiv  Detail & Related papers  (2021-03-10T11:02:45Z)
• Experimental quantum conference key agreement [55.41644538483948]
  Quantum networks will provide multi-node entanglement over long distances to enable secure communication on a global scale. Here we demonstrate quantum conference key agreement, a quantum communication protocol that exploits multi-partite entanglement. We distribute four-photon Greenberger-Horne-Zeilinger (GHZ) states generated by high-brightness, telecom photon-pair sources across up to 50 km of fibre.
  arXiv  Detail & Related papers  (2020-02-04T19:00:31Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.