scholarly journals Free-Space-Optical Quantum Key Distribution Systems: Challenges and Trends

2019 ◽  
Author(s):  
Josue Aaron Lopez-Leyva ◽  
Ariana Talamantes-Alvarez ◽  
Miguel A. Ponce-Camacho ◽  
Edith Garcia-Cardenas ◽  
Eduardo Alvarez-Guzman
Keyword(s):  
Free Space ◽  
Quantum Key Distribution ◽  
Distribution Systems ◽  
Key Distribution ◽  
Free Space Optical

scholarly journals Design and Performance of Relay-Assisted Satellite Free-Space Optical Quantum Key Distribution Systems

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 122498-122510
Author(s):  
Minh Quang Vu ◽  
Thanh V. Pham ◽  
Ngoc T. Dang ◽  
Anh T. Pham
Keyword(s):  
Free Space ◽  
Quantum Key Distribution ◽  
Distribution Systems ◽  
Key Distribution ◽  
Free Space Optical ◽  
And Performance

scholarly journals Entangled quantum key distribution over two free-space optical links

2008 ◽  
Vol 16 (21) ◽  
pp. 16840 ◽  
Author(s):  
C. Erven ◽  
C. Couteau ◽  
R. Laflamme ◽  
G. Weihs
Keyword(s):  
Free Space ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Free Space Optical ◽  
Optical Links

scholarly journals On the Transmission Probabilities in Quantum Key Distribution Systems over FSO Links

2020 ◽  
Author(s):  
Hui Zhao ◽  
Mohamed-Slim Alouini
Keyword(s):  
Fading Channels ◽  
Quantum Key Distribution ◽  
Distribution Systems ◽  
Channel Model ◽  
Asymptotic Expression ◽  
Gaussian Quadrature ◽  
Key Distribution ◽  
Free Space Optical ◽  
Pointing Error ◽  
Q Function

In this paper, we investigate the transmission probabilities in three cases (depending only on the legitimate receiver, depending only the eavesdropper, and depending on both legitimate receiver and eavesdropper) in quantum key distribution (QKD) systems over free-space optical links. To be more realistic, we consider a generalized pointing error scenario, where the azimuth and elevation pointing error angles caused by stochastic jitters and vibrations in the legitimate receiver platform are independently distributed according to a non-identical normal distribution. Taking these assumptions into account, we derive approximate expressions of transmission probabilities by using the Gaussian quadrature method. To simplify the expressions and get some physical insights, some asymptotic analysis on the transmission probabilities is presented based on asymptotic expression for the generalized Marcum Q-function when the telescope gain at the legitimate receiver approaches to infinity. Moreover, from the asymptotic expression for the generalized Marcum Q-function, the asymptotic outage probability over Beckmann fading channels (a general channel model including Rayleigh, Rice, and Hoyt fading channels) can be also easily derived when the average signal-to-noise ratio is sufficiently large, which shows the diversity order and array gain.

scholarly journals Network Coding Aided Cooperative Quantum Key Distribution Over Free-Space Optical Channels

IEEE Access ◽  
2017 ◽  
Vol 5 ◽  
pp. 12301-12317 ◽  
Author(s):  
Hung Viet Nguyen ◽  
Phuc V. Trinh ◽  
Anh T. Pham ◽  
Zunaira Babar ◽  
Dimitrios Alanis ◽  
...  
Keyword(s):  
Network Coding ◽  
Free Space ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Free Space Optical ◽  
Optical Channels

scholarly journals Modeling and Simulation for Performance Evaluation of Optical Quantum Channels in Quantum key Distribution Systems

2021 ◽  
Vol 17 (2) ◽  
pp. 31-44
Author(s):  
Adil Fadhil Mushatet ◽  
Shelan Khasro Tawfeeq
Keyword(s):  
Performance Evaluation ◽  
Optical Fiber ◽  
Free Space ◽  
Quantum Channel ◽  
Quantum Key Distribution ◽  
Distribution Systems ◽  
Key Distribution ◽  
Quantum Channels ◽  
Quantum Bit ◽  
Modeling Process

In this research work, a simulator with time-domain visualizers and configurable parameters using a continuous time simulation approach with Matlab R2019a is presented for modeling and investigating the performance of optical fiber and free-space quantum channels as a part of a generic quantum key distribution system simulator. The modeled optical fiber quantum channel is characterized with a maximum allowable distance of 150 km with 0.2 dB/km at =1550nm. While, at =900nm and =830nm the attenuation values are 2 dB/km and 3 dB/km respectively. The modeled free space quantum channel is characterized at 0.1 dB/km at =860 nm with maximum allowable distance of 150 km also. The simulator was investigated in terms of the execution of the BB84 protocol based on polarizing encoding with consideration of the optical fiber and free-space quantum channel imperfections and losses by estimating the quantum bit error rate and final secure key. This work shows a general repeatable modeling process for significant performance evaluation. The most remarkable result that emerged from the simulated data generated and detected is that the modeling process provides guidance for optical quantum channels design and characterization for other quantum key distribution protocols.

Twin-field quantum key distribution over free-space optical channels in the presence of atmospheric turbulence

2022 ◽  
Author(s):  
Yuqing Huang ◽  
Zhongqi Sun ◽  
Tianqi Dou ◽  
Jipeng Wang ◽  
Zhenhua Li ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Communication Networks ◽  
Free Space ◽  
Quantum Key Distribution ◽  
Quantum Communication ◽  
Channel Model ◽  
Key Distribution ◽  
Global Scale ◽  
Free Space Optical ◽  
Optical Channels

Future quantum communication networks envisaged on a global scale will include various networks interlinked via optical fiber and free space channels. In recent years, quantum key distribution (QKD) protocol based on optical fiber has been extensively studied. Twin-field QKD (TF-QKD) may enable 550 km QKD using standard optical fiber without quantum repeaters. However, the performance of TF-QKD in free-space channel is still unclear. In this paper, a free-space channel model is proposed with specific turbulence characterization discussed. Here, the key rate of TF-QKD under multiple scenarios considering the variation of turbulence and different link configuration is investigated. Simulation results demonstrate that the performance of free-space TF-QKD is related to link configuration and turbulence motion which is determined by surface feature, time and height. Furthermore, TF-QKD protocol is a potential scheme for the free-space quantum communication.

Combining quantum key distribution with chaotic systems for free-space optical communications

2021 ◽  
Vol 20 (11) ◽  
Author(s):  
Naveed Mahmud ◽  
Andrew MacGillivray ◽  
Apurva Rai ◽  
Jenna Patterson ◽  
Adam Gharaibeh ◽  
...  
Keyword(s):  
Optical Communications ◽  
Free Space ◽  
Quantum Key Distribution ◽  
Chaotic Systems ◽  
Key Distribution ◽  
Free Space Optical

scholarly journals On the Transmission Probabilities in Quantum Key Distribution Systems over FSO Links

2020 ◽  
Author(s):  
Hui Zhao ◽  
Mohamed-Slim Alouini
Keyword(s):  
Fading Channels ◽  
Quantum Key Distribution ◽  
Distribution Systems ◽  
Channel Model ◽  
Asymptotic Expression ◽  
Gaussian Quadrature ◽  
Key Distribution ◽  
Free Space Optical ◽  
Pointing Error ◽  
Q Function

In this paper, we investigate the transmission probabilities in three cases (depending only on the legitimate receiver, depending only the eavesdropper, and depending on both legitimate receiver and eavesdropper) in quantum key distribution (QKD) systems over free-space optical links. To be more realistic, we consider a generalized pointing error scenario, where the azimuth and elevation pointing error angles caused by stochastic jitters and vibrations in the legitimate receiver platform are independently distributed according to a non-identical normal distribution. Taking these assumptions into account, we derive approximate expressions of transmission probabilities by using the Gaussian quadrature method. To simplify the expressions and get some physical insights, some asymptotic analysis on the transmission probabilities is presented based on asymptotic expression for the generalized Marcum Q-function when the telescope gain at the legitimate receiver approaches to infinity. Moreover, from the asymptotic expression for the generalized Marcum Q-function, the asymptotic outage probability over Beckmann fading channels (a general channel model including Rayleigh, Rice, and Hoyt fading channels) can be also easily derived when the average signal-to-noise ratio is sufficiently large, which shows the diversity order and array gain.

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