Experimental Demonstration of High-Rate Discrete-Modulated Continuous-Variable Quantum Key Distribution System

• URL: http://arxiv.org/abs/2203.08470v1
• Date: Wed, 16 Mar 2022 08:50:56 GMT
• Title: Experimental Demonstration of High-Rate Discrete-Modulated Continuous-Variable Quantum Key Distribution System
• Authors: Yan Pan, Heng Wang, Yun Shao, Yaodi Pi, Yang Li, Bin Liu, Wei Huang and Bingjie Xu
• Abstract summary: A high-rate continuous-variable quantum key distribution (CV-QKD) system based on high-order discrete modulation is experimentally investigated. The transmission results of 5 km, 10 km, 25 km, and 50 km are achieved for the 1 GB optimized quantum signals.
• Score: 15.960699786435194
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: A high-rate continuous-variable quantum key distribution (CV-QKD) system based on high-order discrete modulation is experimentally investigated. With the help of the novel system scheme, effective digital signal processing algorithms and advanced analytical security proof method, the transmission results of 5 km, 10 km, 25 km, and 50 km are achieved for the 1 GBaud optimized quantum signals. Correspondingly, the asymptotic secret key rate (SKR) is 288.421 Mbps, 159.395 Mbps, 50.004 Mbps and 7.579 Mbps for discrete Gaussian (DG) 64QAM, and 326.708 Mbps, 179.348 Mbps, 50.623 Mbps and 9.212 Mbps for DG 256QAM. Under the same parameters, the achieved SKRs of DG 256QAM is almost same to ideal Gaussian modulation. In this case, the demonstrated high-rate discrete modulated CV-QKD system has the application potential for high speed security communication under tens of kilometers.

Related papers

• Polarization-encoded quantum key distribution with a room-temperature telecom single-photon emitter [47.54990103162742]
  Single photon sources (SPSs) are directly applicable in quantum key distribution (QKD) We report an observation of polarization-encoded QKD using a room-temperature telecom SPS based on a GaN defect.
  arXiv  Detail & Related papers  (2024-09-25T16:17:36Z)
• Integrated high-performance error correction for continuous-variable quantum key distribution [23.485505158582775]
  An integrated error-correction scheme with high throughput, low frame errors rate (FER) and high reconciliation efficiency under low signal to noise ratio (SNR) is proposed. A novel two-stage error correction method with limited precision is proposed, and experimentally verified on a commercial FPGA. Compared with state-of-art results, the error-correction throughput can be improved more than one order of magnitude given FER0.1. The record-breaking results paves the way for large-scale deployment of high-rate integrated CV-QKD systems in metropolitan quantum secure network.
  arXiv  Detail & Related papers  (2024-07-23T12:30:46Z)
• Practical quantum secure direct communication with squeezed states [55.41644538483948]
  We report the first table-top experimental demonstration of a CV-QSDC system and assess its security. This realization paves the way into future threat-less quantum metropolitan networks, compatible with coexisting advanced wavelength division multiplexing (WDM) systems.
  arXiv  Detail & Related papers  (2023-06-25T19:23:42Z)
• Advantages of Asynchronous Measurement-Device-Independent Quantum Key Distribution in Intercity Networks [0.0]
  asynchronous MDI-QKD can furnish the highest key rate with MDI security over distances ranging from 50 km to 480 km. At fiber distances of 50 km and 100 km, the key rates attain 6.02 Mbps and 2.29 Mbps respectively, which are sufficient to facilitate real-time one-time-pad video encryption.
  arXiv  Detail & Related papers  (2023-02-28T06:51:34Z)
• Sub-Mbps key-rate continuous-variable quantum key distribution with local-local-oscillator over 100 km fiber [16.205058702051378]
  We experimentally demonstrated a sub-Mbps key rate Gaussian-modulated coherent-state continuous-variable quantum key distribution (CV-QKD) over 100 km transmission distance. To efficiently control the excess noise, the quantum signal and the pilot tone are co-transmitted in fiber channel based on wide-band frequency and polarization multiplexing methods. The secure key rate (SKR) of the demonstrated CV-QKD is experimentally evaluated to be 10.36 Mbps, 2.59 Mbps, and 0.69 Mbps over transmission distance of 50 km, 75 km, and 100 km, respectively.
  arXiv  Detail & Related papers  (2022-12-22T08:21:22Z)
• 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)
• 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)
• 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)
• High Rate CV-QKD Secured Mobile WDM Fronthaul for Dense 5G Radio Networks [0.0]
  A quantum key distribution (CV-QKD) system is experimentally demonstrated in the framework of 5G mobile fronthaul links. A low excess noise in the order of 0.1% to 0.5% of shot-noise units is obtained for fiber-based transmission over a fronthaul link reach of 13.2 km. Joint signal transmission in the C-band of both, quantum signal and classical signals, is successfully demonstrated.
  arXiv  Detail & Related papers  (2021-04-09T13:44:53Z)
• 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)
• 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.