Fast Single Photon Detectors and real-time Key Distillation: Enabling High Secret Key Rate QKD Systems

• URL: http://arxiv.org/abs/2210.16126v1
• Date: Fri, 28 Oct 2022 13:49:32 GMT
• Title: Fast Single Photon Detectors and real-time Key Distillation: Enabling High Secret Key Rate QKD Systems
• Authors: Fadri Gr\"unenfelder (1), Alberto Boaron (1), Matthieu Perrenoud (1), Giovanni V. Resta (1), Davide Rusca (1), Claudio Barreiro (1), Rapha\"el Houlmann (1), Rebecka Sax (1), Lorenzo Stasi (1 and 2), Sylvain El-Khoury (2), Esther H\"anggi (3), Nico Bosshard (3), F\'elix Bussi\`eres (2) and Hugo Zbinden (1) ((1) Group of Applied Physics, Rue de l'Ecole-de-M\'edecine 20, CH-1211 Gen\`eve 4, Switzerland, (2) ID Quantique SA, Rue Eug\`ene-Marziano 25, CH-1227 Acacias - Gen\`eve Switzerland,(3) Lucerne School of Computer Science and Information Technology, Suurstoffi 1, CH-6343 Rotkreuz, Switzerland)
• Abstract summary: We present a custom multipixel superconducting nanowire single-photon detectors and real-time key distillation electronics. We can generate secret keys at a rate of 64 Mbps over a distance of 10.0 km and at a rate of 3.0 Mbps over a distance of 102.4 km with real-time key distillation.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum Key Distribution has made continuous progress over the last 20 years and is now commercially available. However, the secret key rates (SKR) are still limited to a few Mbps. Here, we present a custom multipixel superconducting nanowire single-photon detectors and fast acquisition and real-time key distillation electronics, removing two roadblocks and allowing an increase of the SKR of more than an order of magnitude. In combination with a simple 2.5 GHz clocked time-bin quantum key distribution system, we can generate secret keys at a rate of 64 Mbps over a distance of 10.0 km and at a rate of 3.0 Mbps over a distance of 102.4 km with real-time key distillation.

Related papers

• High-rate quantum key distribution exceeding 110 Mb/s [26.392377190417413]
  Quantum key distribution (QKD) can provide proven security for secure communication. Here we report a QKD system that is able to generate key at a record high SKR of 115.8 Mb/s over 10-km standard fibre.
  arXiv  Detail & Related papers  (2023-07-05T15:25:25Z)
• Continuous-Variable Quantum Key Distribution at 10 GBaud using an Integrated Photonic-Electronic Receiver [0.5417521241272645]
  Photonic and electronic integrated circuits that can be produced in large volumes at low cost hold the key to large-scale deployment of next-generation QKD systems. We present a continuous-variable (CV) QKD system using an integrated photonic-electronic receiver. The QKD system operates at a classical telecom symbol rate of 10 GBaud, generating high secret key rates exceeding 0.7 Gb/s over a distance of 5 km and 0.3 Gb/s over a distance of 10 km.
  arXiv  Detail & Related papers  (2023-05-31T08:17:09Z)
• Experimental Twin-Field Quantum Key Distribution Over 1000 km Fiber Distance [19.003857958984558]
  Quantum key distribution (QKD) aims to generate secure private keys shared by two remote parties. We demonstrate a fiber-based twin-field QKD over 1002 km. The secure key rate is $9.53times10-12$ per pulse through 1002 km fiber in the regime, and $8.75times10-12$ per pulse at 952 km considering the finite size effect.
  arXiv  Detail & Related papers  (2023-03-28T07:59:59Z)
• Quantum Key Distribution over 100 km underwater optical fiber assisted by a Fast-Gated Single-Photon Detector [44.07851469168589]
  In this work, we implement a quantum key distribution link between Sicily (Italy) and Malta. The performances of a standard commercial SPAD have been compared with the results achieved with a new prototype of fast-gated System in a Package (SiP) SPAD. The SiP detector has shown to be able to accomplish a fourteen times higher key rate compared with the commercial device over the channel showing 20 dB of losses.
  arXiv  Detail & Related papers  (2023-03-02T18:07:31Z)
• 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)
• 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 entanglement distribution over a transnational 248 km fibre link [58.720142291102135]
  Entanglement is the basis of many quantum applications. We present a continuously working international link between Austria and Slovakia. We measure stable pair rates of 9 s$-1$ over an exemplary operation time of 110 hours.
  arXiv  Detail & Related papers  (2022-03-23T13:55:27Z)
• Efficient room-temperature molecular single-photon sources for quantum key distribution [51.56795970800138]
  Quantum Key Distribution (QKD) allows the distribution of cryptographic keys between multiple users in an information-theoretic secure way. We introduce and demonstrate a proof-of-concept QKD system exploiting a molecule-based single-photon source operating at room temperature and emitting at 785nm.
  arXiv  Detail & Related papers  (2022-02-25T11:52:10Z)
• Sub-Gbps key rate four-state continuous-variable quantum key distribution within metropolitan area [17.7228675698146]
  We demonstrate a single-carrier four-state CVQKD with sub-Gbps key rate within metropolitan area. The achieved secure key rates are 190.54 Mbps and 137.76 Mbps and 52.48 Mbps using linear channel assuming security analysis method. This record-breaking result increases the previous secret key rate record by an order of magnitude.
  arXiv  Detail & Related papers  (2021-11-18T06:33:07Z)
• 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.