Differential Phase-Shift QKD in a 2:16-Split Lit PON with 19 Carrier-Grade Channels

• URL: http://arxiv.org/abs/2203.08726v1
• Date: Wed, 16 Mar 2022 16:17:38 GMT
• Title: Differential Phase-Shift QKD in a 2:16-Split Lit PON with 19 Carrier-Grade Channels
• Authors: Nemanja Vokiic, Dinka Milovanvcev, Bernhard Schrenk, Michael Hentschel and Hannes Hubel
• Abstract summary: We investigate the practical network integration of differential phase shift quantum key distribution. We prove that the quantum channel can co-exist with up to 19 classical channels of a fully-loaded modern access standard. The high power difference of 93.8 dB between launched classical and quantum signals in the lit access network leads to a low penalty of 0.52 percent in terms of error ratio.
• Score: 2.026424957803652
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: We investigate the practical network integration of differential phase shift quantum key distribution following a cost-optimized deployment scheme where complexity is off-loaded to a centralized location. User terminal equipment for quantum state preparation at 1 GHz symbol rate is kept technologically lean through use of a directly-modulated laser as optical encoder. Integration in a passive optical network infrastructure is experimentally studied for legacy and modern optical access standards. We analyze the implications that result from Raman scattering arising from different spectral allocations of the classical channels in the O-, S-, C- and L-band, and prove that the quantum channel can co-exist with up to 19 classical channels of a fully-loaded modern access standard. Secure-key generation at a rate of 5.1 times 10e-7 bits per pulse at a quantum bit error ratio of 3.28 percent is obtained over a 13.5 km reach, 2 to 16 split passive network configuration. The high power difference of 93.8 dB between launched classical and quantum signals in the lit access network leads to a low penalty of 0.52 percent in terms of error ratio.

Related papers

• Post-Measurement Pairing Quantum Key Distribution with Local Optical Frequency Standard [4.212309568835716]
  Post-measurement coincidence pairing eliminates the need for tracking the differential phase of the users' lasers. We confirm the setup's repeater-like behavior and achieve a finite-size secure key rate (SKR) of 15.94 bit/s over 504 km fiber. Our work paves the way towards an efficient muti-user quantum network with the local frequency standard.
  arXiv  Detail & Related papers  (2024-07-20T06:26:05Z)
• A Quantum-Classical Collaborative Training Architecture Based on Quantum State Fidelity [50.387179833629254]
  We introduce a collaborative classical-quantum architecture called co-TenQu. Co-TenQu enhances a classical deep neural network by up to 41.72% in a fair setting. It outperforms other quantum-based methods by up to 1.9 times and achieves similar accuracy while utilizing 70.59% fewer qubits.
  arXiv  Detail & Related papers  (2024-02-23T14:09:41Z)
• Coexistence of multiuser entanglement distribution and classical light in optical fiber network with a semiconductor chip [12.760148317855275]
  Building communication links among multiple users in a scalable and robust way is a key objective in achieving large-scale quantum networks. Here we fabricate a semiconductor chip with a high figure-of-merit modal overlap to directly generate broadband polarization entanglement. Our work paves the way for practical multiparty quantum communication with integrated photonic architecture compatible with real-world fiber optical communication network.
  arXiv  Detail & Related papers  (2023-09-26T01:13:54Z)
• 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)
• 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)
• A scalable network for simultaneous pairwise quantum key distribution via entanglement-based time-bin coding [0.0]
  We present a scalable star-shaped quantum key distribution (QKD) optical fiber network. We use wavelength-division demultiplexing (WDM) of broadband photon pairs to establish key exchange between multiple pairs of participants simultaneously. In a field test we demonstrate secure key rates of 6.3 bit/s with a QBER of 4.5% over a total fiber length of 108 km with 26.8 km of deployed fiber between two participants with high stability.
  arXiv  Detail & Related papers  (2021-10-26T15:51:13Z)
• The limits of multiplexing quantum and classical channels: Case study of a 2.5 GHz discrete variable quantum key distribution system [0.0]
  We study the performance of a system running a simplified BB84 protocol at 2.5 GHz repetition rate. We discuss the performance of an ideal system under the same conditions. In this scenario we could exchange a secret key with a launch power up to 16.7 dBm in the classical channels.
  arXiv  Detail & Related papers  (2021-09-06T12:52:58Z)
• Dynamic DV-QKD Networking in Fully-Meshed Software-Defined Optical Networks [0.3355436702348693]
  We demonstrate a four-node trusted-node-free metro network configuration with dynamic discrete-variable quantum key distribution DV-QKD networking capabilities. Coexistence of a quantum channel and six classical channels through a field-deployed fibre test network is examined.
  arXiv  Detail & Related papers  (2021-08-25T09:46:32Z)
• 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)
• 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.