Continuous operation of four-state continuous-variable quantum key distribution system

2016 ◽  
Author(s):  
Takuto Matsubara ◽  
Motoharu Ono ◽  
Yusuke Oguri ◽  
Tsubasa Ichikawa ◽  
Takuya Hirano ◽  
...  
Keyword(s):  
Distribution System ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable ◽  
Continuous Operation

scholarly journals Demonstration of high-speed and low-complexity continuous variable quantum key distribution system with local local oscillator

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shengjun Ren ◽  
Shuai Yang ◽  
Adrian Wonfor ◽  
Ian White ◽  
Richard Penty
Keyword(s):  
Distribution System ◽  
Repetition Rate ◽  
Quantum Key Distribution ◽  
Optimization Technique ◽  
Key Distribution ◽  
Local Oscillator ◽  
Continuous Variable ◽  
Noise Model ◽  
System Level ◽  
Excess Noise

AbstractWe present an experimental demonstration of the feasibility of the first 20 + Mb/s Gaussian modulated coherent state continuous variable quantum key distribution system with a locally generated local oscillator at the receiver (LLO-CVQKD). To increase the signal repetition rate, and hence the potential secure key rate, we equip our system with high-performance, wideband devices and design the components to support high repetition rate operation. We have successfully trialed the signal repetition rate as high as 500 MHz. To reduce the system complexity and correct for any phase shift during transmission, reference pulses are interleaved with quantum signals at Alice. Customized monitoring software has been developed, allowing all parameters to be controlled in real-time without any physical setup modification. We introduce a system-level noise model analysis at high bandwidth and propose a new ‘combined-optimization’ technique to optimize system parameters simultaneously to high precision. We use the measured excess noise, to predict that the system is capable of realizing a record 26.9 Mb/s key generation in the asymptotic regime over a 15 km signal mode fibre. We further demonstrate the potential for an even faster implementation.

Digital Self-Coherent Continuous Variable Quantum Key Distribution System

2020 ◽  
Author(s):  
Tobias A. Eriksson ◽  
Ruben S. Luís ◽  
Kadir Gümüş ◽  
Georg Rademacher ◽  
Benjamin J. Puttnam ◽  
...  
Keyword(s):  
Distribution System ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable

scholarly journals Experimental Implementation of Non-Gaussian Attacks on a Continuous-Variable Quantum-Key-Distribution System

2007 ◽  
Vol 98 (3) ◽  
Author(s):  
Jérôme Lodewyck ◽  
Thierry Debuisschert ◽  
Raúl García-Patrón ◽  
Rosa Tualle-Brouri ◽  
Nicolas J. Cerf ◽  
...  
Keyword(s):  
Distribution System ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable ◽  
Experimental Implementation ◽  
Non Gaussian

scholarly journals Quantum hacking of a continuous-variable quantum-key-distribution system using a wavelength attack

2013 ◽  
Vol 87 (6) ◽  
Author(s):  
Jing-Zheng Huang ◽  
Christian Weedbrook ◽  
Zhen-Qiang Yin ◽  
Shuang Wang ◽  
Hong-Wei Li ◽  
...  
Keyword(s):  
Distribution System ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable
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