scholarly journals Experimental demonstration of long-distance continuous-variable quantum key distribution

2013 ◽  
Vol 7 (5) ◽  
pp. 378-381 ◽  
Author(s):  
Paul Jouguet ◽  
Sébastien Kunz-Jacques ◽  
Anthony Leverrier ◽  
Philippe Grangier ◽  
Eleni Diamanti
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable ◽  
Experimental Demonstration ◽  
Long Distance

scholarly journals Long-Distance Continuous-Variable Quantum Key Distribution over 202.81 km of Fiber

2020 ◽  
Vol 125 (1) ◽  
Author(s):  
Yichen Zhang ◽  
Ziyang Chen ◽  
Stefano Pirandola ◽  
Xiangyu Wang ◽  
Chao Zhou ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable ◽  
Long Distance

scholarly journals Long-Distance Continuous-Variable Quantum Key Distribution With Quantum Scissors

2020 ◽  
Vol 26 (3) ◽  
pp. 1-12 ◽  
Author(s):  
Masoud Ghalaii ◽  
Carlo Ottaviani ◽  
Rupesh Kumar ◽  
Stefano Pirandola ◽  
Mohsen Razavi
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable ◽  
Long Distance

scholarly journals Discrete Modulation Source Enhancement for Continuous Variable Quantum Key Distribution through Photon Catalyzing

2020 ◽  
Author(s):  
Zhengchun Zhou ◽  
Shanhua Zou ◽  
Yun Mao ◽  
Tongcheng Huang ◽  
Ying Guo
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable ◽  
High Rate ◽  
Practical Implementation ◽  
Statistical Fluctuation ◽  
Secret Key ◽  
Long Distance ◽  
Transmission Distance ◽  
Source Preparation

Establishing global high-rate secure communications is a potential application of continuous-variable quantum key distribution (CVQKD) but also challenging for long-distance transmissions in metropolitan areas. The discrete modulation(DM) can make up for the shortage of transmission distance that has a unique advantage against all side-channel attacks, however its further performance improvement requires source preparation in the presence of noise and loss. Here, we consider the effects of photon catalysis (PC) on the DM-involved source preparation for lengthening the maximal transmission distance of the CVQKD system. We address a zero-photon catalysis (ZPC)-based source preparation for enhancing the DM-CVQKD system. The statistical fluctuation due to the finite length of data is taken into account for the practical security analysis. Numerical simulations show that the ZPC-based DM-CVQKD system can not only achieve the extended maximal transmission distance, but also contributes to the reasonable increase of the secret key rate. This approach enables the DM-CVQKD to tolerate lower reconciliation efficiency, which may promote the practical implementation solutions compatible with classical optical communications using state-of-the-art technology.

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