Parameter estimation of orbital angular momentum based continuous-variable quantum key distribution

2020 ◽  
Vol 127 (21) ◽  
pp. 213102
Author(s):  
Di Jin ◽  
Ying Guo ◽  
Yijun Wang ◽  
Duan Huang
Keyword(s):  
Parameter Estimation ◽  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable

scholarly journals High-Rate Continuous-Variable Quantum Key Distribution with Orbital Angular Momentum Multiplexing

Entropy ◽  
2021 ◽  
Vol 23 (9) ◽  
pp. 1187
Author(s):  
Xinchao Ruan ◽  
Wenhao Shi ◽  
Guojun Chen ◽  
Wei Zhao ◽  
Hang Zhang ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable ◽  
High Rate ◽  
Secret Key ◽  
Quantum Communications ◽  
Transmission Distance ◽  
Atmospheric Channel

The secret key rate is one of the main obstacles to the practical application of continuous-variable quantum key distribution (CVQKD). In this paper, we propose a multiplexing scheme to increase the secret key rate of the CVQKD system with orbital angular momentum (OAM). The propagation characteristics of a typical vortex beam, involving the Laguerre–Gaussian (LG) beam, are analyzed in an atmospheric channel for the Kolmogorov turbulence model. Discrete modulation is utilized to extend the maximal transmission distance. We show the effect of the transmittance of the beam over the turbulent channel on the secret key rate and the transmission distance. Numerical simulations indicate that the OAM multiplexing scheme can improve the performance of the CVQKD system and hence has potential use for practical high-rate quantum communications.

Quantum Key Distribution Based on Heralded Pair Coherent State and Orbital Angular Momentum

2019 ◽  
Vol 39 (4) ◽  
pp. 0427001
Author(s):  
何业锋 He Yefeng ◽  
杨红娟 Yang Hongjuan ◽  
王登 Wang Deng ◽  
李东琪 Li Dongqi ◽  
宋畅 Song Chang
Keyword(s):  
Angular Momentum ◽  
Coherent State ◽  
Orbital Angular Momentum ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Pair Coherent State

scholarly journals High-dimensional Quantum Key Distribution with Photonic Orbital Angular Momentum

2014 ◽  
Author(s):  
Mohammad Mirhosseini ◽  
Omar S. Magaña-Loaiza ◽  
Malcolm N. O’Sullivan ◽  
Brandon Rodenburg ◽  
Mehul Malik ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
High Dimensional
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