Atmospheric Effects on Satellite-to-Ground Quantum Key Distribution using Coherent States

Villaseñor, Eduardo J. S.; Malaney, Robert; Mudge, Kerry A.; Grant, Kenneth J.

doi:10.1109/globecom42002.2020.9348086

Cited by 20 publications

(18 citation statements)

References 25 publications

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“…CV-QKD exploits the heritage of classical optical communication in terms of highspeed components and space qualification and may bring a breakthrough in this field. Currently, the progress in satellite CV-QKD mainly focuses on the investigation of feasibility theoretically considering the fluctuation effects in realistic satellite-to-ground links and calculating the secret key rate of Gaussian modulation CV-QKD (Kish et al, 2020;Villasenor et al, 2020;Dequal et al, 2021). The preliminary experimental study was implemented in terms of signal measurement in satellite-to-ground links (Günthner et al, 2017).…”

Section: Neural Network Methodsmentioning

confidence: 99%

Theoretical development of discrete-modulated continuous-variable quantum key distribution

Liu

Li²,

Liu³

et al. 2022

Front. Quantum Sci. Technol.

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Continuous-variable quantum key distribution offers simple, stable and easy-to-implement key distribution systems. The discrete modulation scheme further reduces the technical difficulty. The main regret is that the security of discrete modulation schemes has not been sufficiently demonstrated. Schemes with different signal state distributions use various physical conditions to obtain the key rate formula, resulting in different security levels, computation complexities and implementation difficulties. Therefore, a relatively systematic and logically consistent security proof against most general attacks is worth exploring. On the other hand, extending the discrete modulation scheme and its variants to different applications, such as satellite-to-earth communication, can further activate and advance this field. Here, we briefly review the achievements that have been made in discrete-modulated continuous-variable quantum key distribution, and openly discuss some issues worthy of further research.

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Section: Neural Network Methodsmentioning

confidence: 99%

Theoretical development of discrete-modulated continuous-variable quantum key distribution

Liu

Li²,

Liu³

et al. 2022

Front. Quantum Sci. Technol.

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“…The values of the scintillation index calculated using the phase screens and intensity-based approach for zenith angles of the satellite ranging from 0 to 60 degrees are given in Table 1. They are compared with the results referenced in [19] for the same link configuration. The dependences of the scintillation indices on the zenith angle of the satellite are also shown in Figure 3b.…”

Section: Atmospheric Channel Modeling Using Phase Screens Approachmentioning

confidence: 99%

Simulation framework for classical and quantum communications over the free-space optical channel

Navitskaya

Novik

et al. 2023

Free-Space Laser Communications XXXV

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Free-space optical (FSO) communication has attracted significant interest recently. This technology can potentially complement or be an integral part of next-generation networks. FSO links provide several advantages compared to conventional radio frequency links, including higher data rates, license-free spectrum, and power efficiency. Furthermore, they could be used to access users in remote areas where optical fiber communications are unavailable.Here, we present a simulation framework for modeling, designing, and analyzing classical and quantum communication systems over terrestrial and satellite free-space optical links. We address different FSO use cases in terrestrial, ground-tosatellite, satellite-to-ground, and inter-satellite links using direct-and coherent detection schemes. For the FSO channel modeling, we discuss two methods. The first approach considers atmospheric scintillation, pointing errors, the Doppler effect, attenuation due to the beam diffraction, and scintillation-induced divergence. The second method captures the wavefront of the optical beam using the phase screens technique, which provides a more detailed description of the signal propagation. Additionally, we provide essential details about system-level simulations to analyze and optimize the entire link performance. Finally, we discuss the simulation environment for designing quantum-key distribution (QKD) systems as an FSO use case.Using this simulation framework, we investigate the performance of several different FSO application examples: a terrestrial link with spatial diversity receivers, inter-satellite communication from low Earth to geostationary orbit, and a polarization-encoded BB84 with decoy states QKD over a satellite downlink.

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“…Thus, this process recreates what a receiver with an intensity detector would observe. Numerically, the beam is represented by a uniform grid of pixels, each one assigned with a complex number, and the propagation is modeled via a Fourier algorithm [35]. Since the result of each beam propagation is random, the simulations are run 10,000 times, in order to obtain a correct estimation of the properties of the channel.…”

Section: A Modeling Atmospheric Channelsmentioning

confidence: 99%

Enhanced Uplink Quantum Communication With Satellites via Downlink Channels

Villaseñor

Wang

et al. 2021

IEEE Trans. Quantum Eng.

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In developing the global Quantum Internet, quantum communication with low-Earth-orbit satellites will play a pivotal role. Such communication will need to be two way: effective not only in the satellite-to-ground (downlink) channel but also in the ground-to-satellite channel (uplink). Given that losses on this latter channel are significantly larger relative to the former, techniques that can exploit the superior downlink to enhance quantum communication in the uplink should be explored. In this work we do just that -explore how continuous variable entanglement in the form of two-mode squeezed vacuum (TMSV) states can be used to significantly enhance the fidelity of ground-to-satellite quantum-state transfer relative to direct uplink-transfer. More specifically, through detailed phase-screen simulations of beam evolution through turbulent atmospheres in both the downlink and uplink channels, we demonstrate how a TMSV teleportation channel, created by the satellite, can be used to dramatically improve the fidelity of uplink coherent-state transfer relative to direct transfer. We then show how this, in turn, leads to the uplink-transmission of a higher alphabet of coherent states. Additionally, we show how non-Gaussian operations, acting on the received component of the TMSV state at the ground station, can lead to even further enhancement. Since TMSV states can readily be produced in situ on a satellite platform and form a reliable teleportation channel for most quantum states, our work suggests that future satellites forming part of the emerging Quantum Internet should be designed with uplink-communication via TMSV teleportation in mind.

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Atmospheric Effects on Satellite-to-Ground Quantum Key Distribution using Coherent States

Cited by 20 publications

References 25 publications

Theoretical development of discrete-modulated continuous-variable quantum key distribution

Theoretical development of discrete-modulated continuous-variable quantum key distribution

Simulation framework for classical and quantum communications over the free-space optical channel

Enhanced Uplink Quantum Communication With Satellites via Downlink Channels

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