Information reconciliation (IR) for continuous variable quantum key distribution (QKD) over free space optics (FSO) channel

2019 ◽  
Author(s):  
Fred Daneshgaran ◽  
Marina Mondin ◽  
Shlomi Arnon ◽  
Francesco Di Stasio ◽  
Judy Kupferman
Keyword(s):  
Free Space ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable ◽  
Free Space Optics ◽  
Information Reconciliation ◽  
Space Optics

scholarly journals High Efficiency Continuous-Variable Quantum Key Distribution Based on ATSC 3.0 LDPC Codes

Entropy ◽  
2020 ◽  
Vol 22 (10) ◽  
pp. 1087 ◽  
Author(s):  
Kun Zhang ◽  
Xue-Qin Jiang ◽  
Yan Feng ◽  
Runhe Qiu ◽  
Enjian Bai
Keyword(s):  
Computational Complexity ◽  
Quantum Key Distribution ◽  
Rapid Development ◽  
Ldpc Codes ◽  
Key Distribution ◽  
Continuous Variable ◽  
Parity Check ◽  
Secret Key ◽  
Information Reconciliation ◽  
Transmission Distance

Due to the rapid development of quantum computing technology, encryption systems based on computational complexity are facing serious threats. Based on the fundamental theorem of quantum mechanics, continuous-variable quantum key distribution (CVQKD) has the property of physical absolute security and can effectively overcome the dependence of the current encryption system on the computational complexity. In this paper, we construct the spatially coupled (SC)-low-density parity-check (LDPC) codes and quasi-cyclic (QC)-LDPC codes by adopting the parity-check matrices of LDPC codes in the Advanced Television Systems Committee (ATSC) 3.0 standard as base matrices and introduce these codes for information reconciliation in the CVQKD system in order to improve the performance of reconciliation efficiency, and then make further improvements to final secret key rate and transmission distance. Simulation results show that the proposed LDPC codes can achieve reconciliation efficiency of higher than 0.96. Moreover, we can obtain a high final secret key rate and a long transmission distance through using our proposed LDPC codes for information reconciliation.

Free space continuous-variable quantum key distribution with practical links

2020 ◽  
Vol 37 (12) ◽  
pp. 3690
Author(s):  
Ming Li ◽  
Tianyi Wang ◽  
Jiawei Han ◽  
Zhongyuan Yu ◽  
Milorad Cvijetic ◽  
...  
Keyword(s):  
Free Space ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable

scholarly journals Phase compensation for free-space continuous-variable quantum key distribution

2020 ◽  
Vol 28 (8) ◽  
pp. 10737 ◽  
Author(s):  
Shiyu Wang ◽  
Peng Huang ◽  
Miaomiao Liu ◽  
Tao Wang ◽  
Ping Wang ◽  
...  
Keyword(s):  
Free Space ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable ◽  
Phase Compensation
Sign in / Sign up

Export Citation Format

Share Document