Scalable High-Rate Twin-Field Quantum Key Distribution Networks without Constraint of Probability and Intensity

• URL: http://arxiv.org/abs/2112.11165v3
• Date: Mon, 10 Apr 2023 02:13:52 GMT
• Title: Scalable High-Rate Twin-Field Quantum Key Distribution Networks without Constraint of Probability and Intensity
• Authors: Yuan-Mei Xie, Chen-Xun Weng, Yu-Shuo Lu, Yao Fu, Yang Wang, Hua-Lei Yin, Zeng-Bing Chen
• Abstract summary: We propose a two-photon twin-field quantum key distribution protocol. We exploit the non-interference mode as the code mode to highly tolerate interference errors. Our protocol can transcend the limitations while breaking the secret key capacity of repeaterless quantum key distribution.
• Score: 9.67767681743488
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Implementation of a twin-field quantum key distribution network faces limitations, including the low tolerance of interference errors for phase-matching type protocols and the strict constraint regarding intensity and probability for sending-or-not-sending type protocols. Here, we propose a two-photon twin-field quantum key distribution protocol and achieve twin-field-type two-photon interference through post-matching phase-correlated single-photon interference events. We exploit the non-interference mode as the code mode to highly tolerate interference errors, and the two-photon interference naturally removes the intensity and probability constraint. Therefore, our protocol can transcend the abovementioned limitations while breaking the secret key capacity of repeaterless quantum key distribution. Simulations show that for a four-user networks, under which each node with fixed system parameters can dynamically switch different attenuation links, the key rates of our protocol for all six links can either exceed or approach the secret key capacity. However, the key rates of all links are lower than the key capacity when using phase-matching type protocols. Additionally, four of the links could not extract the key when using sending-or-not-sending type protocols. We anticipate that our protocol can facilitate the development of practical and efficient quantum networks.

Related papers

• Twin-field-based multi-party quantum key agreement [0.0]
  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.
  arXiv  Detail & Related papers  (2024-09-06T11:51:10Z)
• Phase-Matching Quantum Key Distribution without Intensity Modulation [25.004151934190965]
  We propose a phase-matching quantum key distribution protocol without intensity modulation. Simulation results show that the transmission distance of our protocol could reach 305 km in telecommunication fiber. Our protocol provides a promising solution for constructing quantum networks.
  arXiv  Detail & Related papers  (2023-03-21T04:32:01Z)
• Multi-User Entanglement Distribution in Quantum Networks Using Multipath Routing [55.2480439325792]
  We propose three protocols that increase the entanglement rate of multi-user applications by leveraging multipath routing. The protocols are evaluated on quantum networks with NISQ constraints, including limited quantum memories and probabilistic entanglement generation.
  arXiv  Detail & Related papers  (2023-03-06T18:06:00Z)
• Conference key agreement in a quantum network [67.410870290301]
  Quantum conference key agreement (QCKA) allows multiple users to establish a secure key from a shared multi-partite entangled state. In a quantum network, this protocol can be efficiently implemented using a single copy of a N-qubit Greenberger-Horne-Zeilinger (GHZ) state to distil a secure N-user conference key bit.
  arXiv  Detail & Related papers  (2022-07-04T18:00:07Z)
• Data post-processing for the one-way heterodyne protocol under composable finite-size security [62.997667081978825]
  We study the performance of a practical continuous-variable (CV) quantum key distribution protocol. We focus on the Gaussian-modulated coherent-state protocol with heterodyne detection in a high signal-to-noise ratio regime. This allows us to study the performance for practical implementations of the protocol and optimize the parameters connected to the steps above.
  arXiv  Detail & Related papers  (2022-05-20T12:37:09Z)
• Breaking the Rate-Loss Bound of Quantum Key Distribution with Asynchronous Two-Photon Interference [16.81040156666027]
  A new quantum key distribution protocol can surpass the secret key capacity even without phase tracking and phase locking. Our work provides a promising candidate for practical scalable quantum communication networks.
  arXiv  Detail & Related papers  (2021-12-22T02:42:43Z)
• Differential Phase Shift Quantum Secret Sharing Using a Twin Field with Asymmetric Source Intensities [1.2406207242281755]
  We present a differential phase shift quantum secret sharing protocol with asymmetric source intensities. Taking finite-key effects into account, our protocol can theoretically obtain the key rate two orders of magnitude higher than that of the original protocol. Our work is meaningful for the real-life applications of quantum secret sharing.
  arXiv  Detail & Related papers  (2021-07-22T05:52:50Z)
• Overcoming the rate-distance limit of device-independent quantum key distribution [7.864517207531803]
  Device-independent quantum key distribution (DIQKD) exploits the violation of a Bell inequality to extract secure key. We propose a heralded DIQKD scheme based on entangled coherent states to improve entangling rates.
  arXiv  Detail & Related papers  (2021-03-31T14:58:46Z)
• Composably secure data processing for Gaussian-modulated continuous variable quantum key distribution [58.720142291102135]
  Continuous-variable quantum key distribution (QKD) employs the quadratures of a bosonic mode to establish a secret key between two remote parties. We consider a protocol with homodyne detection in the general setting of composable finite-size security. In particular, we analyze the high signal-to-noise regime which requires the use of high-rate (non-binary) low-density parity check codes.
  arXiv  Detail & Related papers  (2021-03-30T18:02:55Z)
• Round-robin differential phase-time-shifting protocol for quantum key distribution: theory and experiment [58.03659958248968]
  Quantum key distribution (QKD) allows the establishment of common cryptographic keys among distant parties. Recently, a QKD protocol that circumvents the need for monitoring signal disturbance, has been proposed and demonstrated in initial experiments. We derive the security proofs of the round-robin differential phase-time-shifting protocol in the collective attack scenario. Our results show that the RRDPTS protocol can achieve higher secret key rate in comparison with the RRDPS, in the condition of high quantum bit error rate.
  arXiv  Detail & Related papers  (2021-03-15T15:20:09Z)
• 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.