Sending-or-not-sending quantum key distribution with phase postselection

• URL: http://arxiv.org/abs/2401.02304v2
• Date: Wed, 10 Jan 2024 01:38:36 GMT
• Title: Sending-or-not-sending quantum key distribution with phase postselection
• Authors: Yang-Guang Shan, Yao Zhou, Zhen-Qiang Yin, Shuang Wang, Wei Chen, De-Yong He, Guang-Can Guo, Zheng-Fu Han
• Abstract summary: Authors introduce phase postselection into the SNS protocol. The transmission distance can be improved both with and without the actively odd-parity pairing method.
• Score: 9.224353374326876
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum key distribution (QKD) could help to share secure key between two distant peers. In recent years, twin-field (TF) QKD has been widely investigated because of its long transmission distance. One of the popular variants of TF QKD is sending-or-not-sending (SNS) QKD, which has been experimentally verified to realize 1000-km level fibre key distribution. In this article, the authors introduce phase postselection into the SNS protocol. With this modification, the probability of selecting "sending" can be substantially improved. The numerical simulation shows that the transmission distance can be improved both with and without the actively odd-parity pairing method. With discrete phase randomization, the variant can have both a larger key rate and a longer distance.

Related papers

• Two-mode squeezing over deployed fiber coexisting with conventional communications [55.41644538483948]
  Multi-mode squeezing is critical for enabling CV quantum networks and distributed quantum sensing. To date, multi-mode squeezing measured by homodyne detection has been limited to single-room experiments. This demonstration enables future applications in quantum networks and quantum sensing that rely on distributed multi-mode squeezing.
  arXiv  Detail & Related papers  (2023-04-20T02:29:33Z)
• Twin-field quantum key distribution with partial phase postselection [13.534186932974507]
  Quantum key distribution (QKD) allows two remote parties to share information-theoretically secure keys. Phase-randomization and subsequent postselection play important roles in its security proof. We propose a TF-QKD protocol with partial phase postselection.
  arXiv  Detail & Related papers  (2022-11-23T03:51:03Z)
• Finite-key analysis for quantum key distribution with discrete phase randomization [21.561489948824274]
  We develop a technique based on conjugate measurement and quantum state distinguishment to ana-lyze the security. Our result shows that TF-QKD with reasonable number of discrete random phases, e.g. 8 phases from 0, pi/4, pi/2,..., 7pi/4, can achieve satisfactory performance.
  arXiv  Detail & Related papers  (2022-01-09T15:45:44Z)
• Towards fully-fledged quantum and classical communication over deployed fiber with up-conversion module [47.187609203210705]
  We propose and demonstrate a new method, based on up-conversion assisted receiver, for co-propagating classical light and QKD signals. Our proposal exhibits higher tolerance for noise in comparison to the standard receiver, thus enabling the distribution of secret keys in the condition of 4 dB-higher classical power.
  arXiv  Detail & Related papers  (2021-06-09T13:52:27Z)
• 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)
• 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)
• Sending or not sending twin-field quantum key distribution with distinguishable decoy states [10.66830089114367]
  We find the external modulation of different intensity states through the test, required in those TF-QKD with post-phase compensation, shows a side channel in frequency domain. We propose a complete and undetected eavesdropping attack, named passive frequency shift attack, on sending or not-sending TF-QKD protocol. Our results emphasize the importance of practical security at source and might provide a valuable reference for the practical implementation of TF-QKD.
  arXiv  Detail & Related papers  (2021-01-27T09:37:41Z)
• Twin-field quantum key distribution with fully discrete phase randomization [1.0312968200748116]
  We propose and prove the security of a TF-QKD variant that relies exclusively on discrete phase randomisation. Results show that it can also provide higher secret-key rates than counterpart protocols that rely on continuous phase randomisation.
  arXiv  Detail & Related papers  (2020-08-07T15:31:18Z)
• Finite-key analysis for twin-field quantum key distribution based on generalized operator dominance condition [23.004519226886444]
  Quantum key distribution (QKD) can help two distant peers to share secret key bits, whose security is guaranteed by the law of physics. Recently, twin-field (TF) QKD has been proposed and intensively studied, since it can beat the rate-distance limit. We propose an improved finite-key analysis of TF-QKD through new operator dominance condition.
  arXiv  Detail & Related papers  (2020-07-17T09:41:06Z)
• Upper bounds on device-independent quantum key distribution [4.7840623105240585]
  Device-independent quantum key distribution (DIQKD) is a version of QKD with a stronger notion of security. We study the rate at which DIQKD can be carried out for a given bipartite quantum state distributed between the sender and receiver.
  arXiv  Detail & Related papers  (2020-05-27T17:41:38Z)

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.