Phase compensation of continuous variable quantum key distribution based on mean denoising methods

2021 ◽  
Author(s):  
Fu Lifeng ◽  
Liu Jinlu ◽  
Zhang Chenlin ◽  
Zhang Tao ◽  
Shao Yun ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable ◽  
Phase Compensation

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

scholarly journals Phase Compensation for Continuous Variable Quantum Key Distribution

2019 ◽  
Author(s):  
Hou-Man Chin ◽  
Darko Zibar ◽  
Nitin Jain ◽  
Tobias Gehring ◽  
Ulrik L. Andersen
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable ◽  
Phase Compensation

scholarly journals Phase compensation based on step-length control in continuous-variable quantum key distribution

2019 ◽  
Vol 27 (15) ◽  
pp. 20670 ◽  
Author(s):  
Dengwen Li ◽  
Peng Huang ◽  
Tao Wang ◽  
Shiyu Wang ◽  
Rui Chen ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Step Length ◽  
Continuous Variable ◽  
Phase Compensation

scholarly journals An FPGA-Based LDPC Decoder With Ultra-Long Codes for Continuous-Variable Quantum Key Distribution

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 47687-47697
Author(s):  
Shen-Shen Yang ◽  
Jian-Qiang Liu ◽  
Zhen-Guo Lu ◽  
Zeng-Liang Bai ◽  
Xu-Yang Wang ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable ◽  
Ldpc Decoder

scholarly journals A novel error correction protocol for continuous variable quantum key distribution

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kadir Gümüş ◽  
Tobias A. Eriksson ◽  
Masahiro Takeoka ◽  
Mikio Fujiwara ◽  
Masahide Sasaki ◽  
...  
Keyword(s):  
Error Correction ◽  
Quantum Key Distribution ◽  
Ldpc Codes ◽  
Key Distribution ◽  
Continuous Variable ◽  
Early Termination ◽  
Parity Check ◽  
Secret Key ◽  
Ldpc Decoder ◽  
And Performance

AbstractReconciliation is a key element of continuous-variable quantum key distribution (CV-QKD) protocols, affecting both the complexity and performance of the entire system. During the reconciliation protocol, error correction is typically performed using low-density parity-check (LDPC) codes with a single decoding attempt. In this paper, we propose a modification to a conventional reconciliation protocol used in four-state protocol CV-QKD systems called the multiple decoding attempts (MDA) protocol. MDA uses multiple decoding attempts with LDPC codes, each attempt having fewer decoding iteration than the conventional protocol. Between each decoding attempt we propose to reveal information bits, which effectively lowers the code rate. MDA is shown to outperform the conventional protocol in regards to the secret key rate (SKR). A 10% decrease in frame error rate and an 8.5% increase in SKR are reported in this paper. A simple early termination for the LDPC decoder is also proposed and implemented. With early termination, MDA has decoding complexity similar to the conventional protocol while having an improved SKR.

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