Performance analysis for OFDM-based multi-carrier continuous-variable quantum key distribution with arbitrary modulation protocol

• URL: http://arxiv.org/abs/2212.11537v1
• Date: Thu, 22 Dec 2022 08:25:11 GMT
• Title: Performance analysis for OFDM-based multi-carrier continuous-variable quantum key distribution with arbitrary modulation protocol
• Authors: Heng Wang, Yan Pan, Yun Shao, Yaodi Pi, Ting Ye, Yang Li, Tao Zhang, Jinlu Liu, Jie Yang, Li Ma, Wei Huang and Bingjie Xu
• Abstract summary: Multi-carrier continuous-variable quantum key distribution (CV-QKD) is considered to be a promising way to boost the secret key rate (SKR) over the existing single-carrier CV-QKD scheme. The extra excess noise induced in the imperfect multi-carrier quantum state preparation process of N subcarriers will limit the performance of the system.
• Score: 19.348846862397632
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Multi-carrier continuous-variable quantum key distribution (CV-QKD) is considered to be a promising way to boost the secret key rate (SKR) over the existing single-carrier CV-QKD scheme. However, the extra excess noise induced in the imperfect multi-carrier quantum state preparation process of N subcarriers will limit the performance of the system. Here, a systematic modulation noise model is proposed for the multi-carrier CV-QKD based on the orthogonal frequency division multiplexing (OFDM). Subsequently, the performance of multi-carrier CV-QKD with arbitrary modulation protocol (e.g. QPSK, 256QAM and Gaussian modulation protocol) can be quantitatively evaluated by combining the security analysis method of the single-carrier CV-QKD. Under practical system parameters, the simulation results show that the SKR of the multi-carrier CV-QKD can still be significantly improved by increasing the carrier number N even with imperfect practical modulations. Specifically, the total SKR of multi-carrier CV-QKD can be optimized by carefully choosing N. The proposed model provides a feasible theoretical framework for the future multi-carrier CV-QKD experimental implementation.

Related papers

• Real-time error mitigation for variational optimization on quantum hardware [45.935798913942904]
  We define a Real Time Quantum Error Mitigation (RTQEM) algorithm to assist in fitting functions on quantum chips with VQCs. Our RTQEM routine can enhance VQCs' trainability by reducing the corruption of the loss function.
  arXiv  Detail & Related papers  (2023-11-09T19:00:01Z)
• Mapping Guaranteed Positive Secret Key Rates for Continuous Variable Quantum Key Distribution [0.21111026813272177]
  Continuous variable quantum key distribution (CVQKD) is the sharing of secret keys between different parties using the continuous amplitude and phasera quadtures of light. Here, a comparison tool has been developed to map regions of positive secret key rate (SKR) The method has been developed for discrete modulated CVQKD (DM-CVQKD) protocols but can be extended to other current and future protocols and security proofs.
  arXiv  Detail & Related papers  (2023-10-26T11:44:39Z)
• High-rate discretely-modulated continuous-variable quantum key distribution using quantum machine learning [4.236937886028215]
  We propose a high-rate scheme for discretely-modulated continuous-variable quantum key distribution (DM CVQKD) using quantum machine learning technologies. A low-complexity quantum k-nearest neighbor (QkNN) is designed for predicting the lossy discretely-modulated coherent states (DMCSs) at Bob's side. Numerical simulation shows that the secret key rate of our proposed scheme is explicitly superior to the existing DM CVQKD protocols.
  arXiv  Detail & Related papers  (2023-08-07T04:00:13Z)
• Unbiasing time-dependent Variational Monte Carlo by projected quantum evolution [44.99833362998488]
  We analyze the accuracy and sample complexity of variational Monte Carlo approaches to simulate quantum systems classically. We prove that the most used scheme, the time-dependent Variational Monte Carlo (tVMC), is affected by a systematic statistical bias. We show that a different scheme based on the solution of an optimization problem at each time step is free from such problems.
  arXiv  Detail & Related papers  (2023-05-23T17:38:10Z)
• Importance sampling for stochastic quantum simulations [68.8204255655161]
  We introduce the qDrift protocol, which builds random product formulas by sampling from the Hamiltonian according to the coefficients. We show that the simulation cost can be reduced while achieving the same accuracy, by considering the individual simulation cost during the sampling stage. Results are confirmed by numerical simulations performed on a lattice nuclear effective field theory.
  arXiv  Detail & Related papers  (2022-12-12T15:06:32Z)
• CSQ: Growing Mixed-Precision Quantization Scheme with Bi-level Continuous Sparsification [51.81850995661478]
  Mixed-precision quantization has been widely applied on deep neural networks (DNNs) Previous attempts on bit-level regularization and pruning-based dynamic precision adjustment during training suffer from noisy gradients and unstable convergence. We propose Continuous Sparsification Quantization (CSQ), a bit-level training method to search for mixed-precision quantization schemes with improved stability.
  arXiv  Detail & Related papers  (2022-12-06T05:44:21Z)
• Satellite-to-Ground Continuous Variable Quantum Key Distribution: The Gaussian and Discrete Modulated Protocols in Low Earth Orbit [0.4221619479687067]
  We study the discrete modulated CVQKD (DM-CVQKD) protocol over a satellite-to-ground link in the low SNR regime. Results show that GM-CVQKD with MD reconciliation outperforms DM-CVQKD with MLC-MSD reconciliation in the finite size limit.
  arXiv  Detail & Related papers  (2022-11-30T10:04:11Z)
• 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)
• Coherent detection schemes for subcarrier wave continuous variable quantum key distribution [48.87378091233822]
  We examine different methods to implement coherent detection in the subcarrier wave quantum key distribution (SCW QKD) systems. For classical wavefields, we present the models describing homodyne-type and heterodyne-type coherent detection schemes.
  arXiv  Detail & Related papers  (2020-06-30T05:46:09Z)
• Enhancing discrete-modulated continuous-variable measurement-device-independent quantum key distribution via quantum catalysis [2.385953310482485]
  discrete modulation can make up for the shortage of transmission distance in measurement device continuous-variable key distribution. We suggest a quantum (QC) approach for enhancing the performance of the discrete-modulated (DM) MDI-CVQKD.
  arXiv  Detail & Related papers  (2020-04-22T07:59:02Z)
• Machine learning aided carrier recovery in continuous-variable quantum key distribution [0.6999740786886537]
  Experimental results over a 20 km fibre-optic link indicate that the unscented Kalman filter (UKF) can ensure very low excess noise even at low pilot powers. This may enable CV-QKD systems with low implementation complexity which can seamlessly work on diverse transmission lines.
  arXiv  Detail & Related papers  (2020-02-21T14:21:48Z)

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.