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.

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 Full daylight quantum-key-distribution at 1550 nm enabled by integrated silicon photonics

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
M. Avesani ◽  
L. Calderaro ◽  
M. Schiavon ◽  
A. Stanco ◽  
C. Agnesi ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Silicon Photonics ◽  
Free Space ◽  
Quantum Key Distribution ◽  
Cost Effective ◽  
Key Distribution ◽  
Global Scale ◽  
Secret Key ◽  
Quantum Bit ◽  
Integrated Silicon Photonics

AbstractThe future envisaged global-scale quantum-communication network will comprise various nodes interconnected via optical fibers or free-space channels, depending on the link distance. The free-space segment of such a network should guarantee certain key requirements, such as daytime operation and the compatibility with the complementary telecom-based fiber infrastructure. In addition, space-to-ground links will require the capability of designing light and compact quantum devices to be placed in orbit. For these reasons, investigating available solutions matching all the above requirements is still necessary. Here we present a full prototype for daylight quantum key distribution at 1550 nm exploiting an integrated silicon-photonics chip as state encoder. We tested our prototype in the urban area of Padua (Italy) over a 145 m-long free-space link, obtaining a quantum bit error rate around 0.5% and an averaged secret key rate of 30 kbps during a whole sunny day (from 11:00 to 20:00). The developed chip represents a cost-effective solution for portable free-space transmitters and a promising resource to design quantum optical payloads for future satellite missions.

scholarly journals A model to estimate performance of space-based quantum communication protocols including quantum key distribution systems

2017 ◽  
Vol 16 (1) ◽  
pp. 5-13
Author(s):  
Jonathan C Denton ◽  
Douglas D Hodson ◽  
Richard G Cobb ◽  
Logan O Mailloux ◽  
Michael R Grimaila ◽  
...  
Keyword(s):  
Quantum Key Distribution ◽  
Distribution Systems ◽  
Quantum Communication ◽  
Channel Model ◽  
Communication Protocols ◽  
Key Distribution ◽  
General Purpose ◽  
Optical Channel ◽  
Use Case ◽  
Atmospheric Conditions

This work presents a model to estimate the performance of space-based, optical-based, quantum communication protocols. This model consists of components to account for optical channel propagation effects based on orbit selection and atmospheric conditions. The model presented is general purpose and can be leveraged to evaluate the performance of a variety of quantum communication protocols, of which, Quantum Key Distribution (QKD) systems served as our motivating use case of particular interest. To verify correctness, the model is used to produce estimates for QKD system scenarios and compared to published results. The performance of QKD systems is of interest as distance limitations for terrestrial-based systems have hindered their practical use, and satellite-based designs that can generate a shared key between two distant geographic locations have been proposed. For this application domain, a review of space-based designs that illuminate the need for a free space downlink channel model is presented followed by its development to estimate the performance of quantum exchanges between a satellite and ground site.

QCalc: a tool to compute classical and quantum communication rates over free-space optical channels

2021 ◽  
Author(s):  
Davide Orsucci ◽  
Jorge Rosano Nonay ◽  
Amita Shrestha ◽  
Florian Moll
Keyword(s):  
Free Space ◽  
Quantum Communication ◽  
Free Space Optical ◽  
Optical Channels

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 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 Free Space Measurement Device Independent Quantum Key Distribution with Modulating Retro-Reflectors under Correlated Turbulent Channel

Entropy ◽  
2021 ◽  
Vol 23 (10) ◽  
pp. 1299
Author(s):  
Xingyu Wang ◽  
Wei Liu ◽  
Tianyi Wu ◽  
Chang Guo ◽  
Yijun Zhang ◽  
...  
Keyword(s):  
Free Space ◽  
Quantum Key Distribution ◽  
Channel Model ◽  
Key Distribution ◽  
Superior Performance ◽  
Double Pass ◽  
Plug And Play ◽  
Measurement Device ◽  
Moving Platforms ◽  
Measurement Device Independent

Modulating retro-reflector (MRR), originally introduced to support laser communication, relieves most of the weight, power, and pointing requirements to the ground station. In this paper, a plug-and-play measurement device independent quantum key distribution (MDI-QKD) scheme with MRR is proposed not only to eliminate detector side channels and allow an untrusted satellite relay between two users, but also to simplify the requirements set-ups in practical flexible moving scenarios. The plug-and-play architecture compensates for the polarization drift during the transmission to provide superior performance in implementing the MDI-QKD on a free-space channel, and the MRR device is adopted to relax the requirements on both communication terminals. A double-pass correlated turbulent channel model is presented to investigate the complex and unstable channel characteristics caused by the atmospheric turbulence. Furthermore, the security of the modified MDI-QKD scheme is analyzed under some classical attacks and the simulation results indicate the feasibility under the situation that the system performance deteriorates with the increase of fading correlation coefficient and the turbulence intensity, which provides a meaningful step towards an MDI-QKD based on the moving platforms to join a dynamic quantum network with untrusted relays.

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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