Coexistence of continuous-variable quantum key distribution and classical data over 120-km fiber

• URL: http://arxiv.org/abs/2502.17388v1
• Date: Mon, 24 Feb 2025 18:14:09 GMT
• Title: Coexistence of continuous-variable quantum key distribution and classical data over 120-km fiber
• Authors: Adnan A. E. Hajomer, Ivan Derkach, Vladyslav C. Usenko, Ulrik L. Andersen, Tobias Gehring,
• Abstract summary: We show the longest-distance continuous-variable QKD over 120 km (20 dB loss) coexisting with a fully populated coarse wavelength-division multiplexing system.<n>Our results set a record distance for CV-QKD, showing its potential for cost-effective, large-scale deployment in existing network infrastructure.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Integrating quantum key distribution (QKD) with classical data transmission over the same fiber is crucial for scalable quantum-secured communication. However, noise from classical channels limits QKD distance. We demonstrate the longest-distance continuous-variable QKD (CV-QKD) over 120 km (20 dB loss) coexisting with a fully populated coarse wavelength-division multiplexing (CWDM) system. Natural mode filtering of the local oscillator and phase noise mitigation enabled this without additional filtering or wavelength reallocation. Benchmarking against a commercial discrete-variable QKD system and considering finite-size effects confirms the feasibility of CV-QKD as a plug-and-play solution for typical 80--100 km long-haul optical networks. Our results set a record distance for CV-QKD, showing its potential for cost-effective, large-scale deployment in existing network infrastructure.

Related papers

• 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)
• Metropolitan quantum key distribution using a GaN-based room-temperature telecommunication single-photon source [54.32714639668751]
  Single-photon sources (SPS) hold the potential to enhance the performance of quantum key distribution (QKD) We have successfully demonstrated QKD using a room-temperature SPS at telecommunication wavelength.
  arXiv  Detail & Related papers  (2024-09-27T07:35:51Z)
• Continuous-variable quantum key distribution field-test with true local oscillator [0.7528223370654119]
  Continuous-variable quantum key distribution (CV-QKD) has been proposed to remove any possibility of side-channel attacks. This is the first demonstration of CV-QKD with a receiver-based true LO over a deployed fiber network.
  arXiv  Detail & Related papers  (2023-09-07T18:22:10Z)
• Eavesdropper localization for quantum and classical channels via nonlinear scattering [58.720142291102135]
  Quantum key distribution (QKD) offers theoretical security based on the laws of physics. We present a novel approach to eavesdropper location that can be employed in quantum as well as classical channels. We demonstrate that our approach outperforms conventional OTDR in the task of localizing an evanescent outcoupling of 1% with cm precision inside standard optical fibers.
  arXiv  Detail & Related papers  (2023-06-25T21:06:27Z)
• Long-distance continuous-variable quantum key distribution over 100 km fiber with local local oscillator [0.6524460254566905]
  Quantum key distribution (QKD) enables two remote parties to share encryption keys with security based on the laws of physics. Here, we report a long-distance CV-QKD experiment with a locally generated local oscillator over a 100 km fiber channel with a total loss of 15.4 dB. This record-breaking distance is achieved by controlling the phase-noise-induced excess noise through a machine-learning framework for carrier recovery and optimizing the modulation variance.
  arXiv  Detail & Related papers  (2023-05-14T13:34:20Z)
• Time-Interleaving Enabled Co-propagation of QKD and Classical Channels over 100-km Fiber with 10-dBm Classical Launch Power [2.6857548685427357]
  We develop a time-interleaving technique to enable the co-propagation of quantum and classical channels in the C-band without sacrificing either performance. We demonstrate the co-propagation of a polarization-encoding decoy-state BB84 QKD channel with a 100 Gb/s QPSK channel with 10-dBm launch power in the C-band over 100 km of fiber.
  arXiv  Detail & Related papers  (2023-04-26T21:10:12Z)
• High-dimensional quantum key distribution using energy-time entanglement over 242 km partially deployed fiber [8.905152890117282]
  Entanglement-based quantum key distribution (QKD) is an essential ingredient in quantum communication. We report an experimental QKD using energy-time entangled photon pairs that transmit over optical fibers of 242 km. We generate secure keys with secure key rates of 0.22 bps and 0.06 bps in and finite-size regime.
  arXiv  Detail & Related papers  (2022-12-06T01:37:57Z)
• Single-emitter quantum key distribution over 175 km of fiber with optimised finite key rates [45.82374977939355]
  We perform fibre-based quantum key distribution with a quantum dot frequency-converted to telecom wavelength. We demonstrate positive key rates up to 175 km in the regime. This result represents major progress towards the feasibility of long-distance single-emitter QKD networks.
  arXiv  Detail & Related papers  (2022-09-07T18:03:36Z)
• Continuous-Variable Quantum Key Distribution over 15 km Multi-Core Fiber [0.0]
  Continuous-variable quantum key distribution (CV-QKD) is a technology that can potentially provide information-theoretic security to cryptographic systems. CV-QKD is highly attractive thanks to high secret key rate generation over metropolitan distances and integration with the current classical communication networks.
  arXiv  Detail & Related papers  (2022-01-10T15:18:21Z)
• 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)
• 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)

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.