scholarly journals Provably secure and high-rate quantum key distribution with time-bin qudits

2017 ◽  
Vol 3 (11) ◽  
pp. e1701491 ◽  
Author(s):  
Nurul T. Islam ◽  
Charles Ci Wen Lim ◽  
Clinton Cahall ◽  
Jungsang Kim ◽  
Daniel J. Gauthier
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
High Rate ◽  
Provably Secure

Continuous-variable quantum key distribution based on high-rate phase reference

Laser Physics ◽  
2019 ◽  
Vol 29 (7) ◽  
pp. 075202
Author(s):  
Jinjing Shi ◽  
Fang Zhou ◽  
Shuhui Chen ◽  
Ying Guo ◽  
Duan Huang
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable ◽  
High Rate

High-rate quantum key distribution using Gaussian-modulated coherent states

2004 ◽  
Author(s):  
F. Grosshans ◽  
J. Wenger ◽  
R. Tualle-Brouri ◽  
P. Grangier ◽  
G. Van Assche ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Coherent States ◽  
Key Distribution ◽  
High Rate

scholarly journals High-Rate Quantum Key Distribution with Superconducting Nanowire Single Photon Detectors

2010 ◽  
Author(s):  
Eric A. Dauler ◽  
Neal W. Spellmeyer ◽  
Andrew J. Kerman ◽  
Richard J. Molnar ◽  
Karl K. Berggren ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Single Photon ◽  
Key Distribution ◽  
High Rate ◽  
Photon Detectors ◽  
Single Photon Detectors ◽  
Superconducting Nanowire

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.

scholarly journals Sub-Gbps Key Rate Four-State Continuous-Variable Quantum Key Distribution within Metropolitan Area

2021 ◽  
Author(s):  
Heng Wang ◽  
Yang Li ◽  
Yaodi Pi ◽  
Yan Pan ◽  
Yun Shao ◽  
...  
Keyword(s):  
Metropolitan Area ◽  
Quantum Key Distribution ◽  
Security Analysis ◽  
Key Distribution ◽  
Continuous Variable ◽  
High Rate ◽  
Excess Noise ◽  
Analysis Method ◽  
Secret Key ◽  
High Efficient

Abstract Continuous-variable quantum key distribution (CVQKD) has potential advantages of high secret key rate, which is very suitable for high-speed metropolitan network application. However, the reported highest secret key rates of the CVQKD systems up to now are limited in a few Mbps. Here, we address the fundamental experimental problems and demonstrate a single-carrier four-state CVQKD with sub-Gbps key rate within metropolitan area. In the demonstrated four-state CVQKD using local local oscillator, an ultra-low level of excess noise is obtained and a high efficient post-processing setup is designed for practically extracting the final secure keys. Thus, the achieved secure key rates are 190.54 Mbps and 137.76 Mbps and 52.48 Mbps using linear channel assuming security analysis method and 233.87 Mbps, 133.6 Mbps and 21.53 Mbps using semidefinite programming security analysis method over transmission distances of 5 km, 10 km and 25 km, respectively. This record-breaking result increases the previous secret key rate record by an order of magnitude, which is sufficient to achieve the one-time pad cryptographic task. Our work shows the road for future high-rate and large-scale CVQKD deployment in secure broadband metropolitan and access networks.

scholarly journals A balanced homodyne detector for high-rate Gaussian-modulated coherent-state quantum key distribution

2011 ◽  
Vol 13 (1) ◽  
pp. 013003 ◽  
Author(s):  
Yue-Meng Chi ◽  
Bing Qi ◽  
Wen Zhu ◽  
Li Qian ◽  
Hoi-Kwong Lo ◽  
...  
Keyword(s):  
Coherent State ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
High Rate ◽  
Homodyne Detector

scholarly journals Scalable high-rate, high-dimensional time-bin encoding quantum key distribution

2019 ◽  
Vol 4 (3) ◽  
pp. 035008 ◽  
Author(s):  
Nurul T Islam ◽  
Charles Ci Wen Lim ◽  
Clinton Cahall ◽  
Bing Qi ◽  
Jungsang Kim ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
High Rate ◽  
High Dimensional
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