Modulation noise model for multi-carrier Gaussian modulated continuous-variable quantum key distribution based on OFDM technology

Ting Ye; Heng Wang; Yan Pan; Yaodi Pi; Yun Shao; Zhiwang Gan; Yang Li; Wei Huang; Bingjie Xu

doi:10.1117/12.2687125

26 November 2023 Modulation noise model for multi-carrier Gaussian modulated continuous-variable quantum key distribution based on OFDM technology

Ting Ye, Heng Wang, Yan Pan, Yaodi Pi, Yun Shao, Zhiwang Gan, Yang Li, Wei Huang, Bingjie Xu

Author Affiliations +

Proceedings Volume 12775, Quantum and Nonlinear Optics X; 127751C (2023) https://doi.org/10.1117/12.2687125
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Conference Poster

Abstract

In this paper, a multi-carrier Gaussian modulated continuous variable quantum key distribution (CV-QKD) scheme has been proposed based on orthogonal frequency division multiplexing (OFDM) for distributing multiplexing independent secret keys encoded on N subcarriers within a single fiber channel. However, the performance of the system will be significantly influenced by the extra modulation noise in the multi-carrier quantum state preparation. Therefore, a modulation noise model is analyzed in more compact for multi-carrier Gaussian modulated CV-QKD system. Specifically, the gain imbalance and quadrature skew in IQ modulation and the third-order intermodulation effect in N subcarrier modulation are systematically analyzed in the OFDM-based multi-carrier CV-QKD with Gaussian modulation. That is, the IQ imbalance noise and the intermodulation noise are modeled as the modulation noise of the multi-carrier Gaussian modulated CV-QKD system. Moreover, the secure performances of the multi-carrier Gaussian modulated CVQKD are evaluated based on the proposed modulation noise model. Besides, the simulation results show the SKRs are greatly increased by N independent quantum state preparation, which indicates that the multi-carrier CV-QKD system gets rid of the asymptotic SKR limit of single-carrier CV-QKD system for future high-rate CV-QKD deployment in broadband access network.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ting Ye, Heng Wang, Yan Pan, Yaodi Pi, Yun Shao, Zhiwang Gan, Yang Li, Wei Huang, and Bingjie Xu "Modulation noise model for multi-carrier Gaussian modulated continuous-variable quantum key distribution based on OFDM technology", Proc. SPIE 12775, Quantum and Nonlinear Optics X, 127751C (26 November 2023); https://doi.org/10.1117/12.2687125

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available