arXiv:2605.02272

A Review on Quantum Satellite Communications: Challenges and Future Directions

Omar Alnaseri, Yassine Himeur, Ahmed Z.R. Al Asadi, Mohammed Alaa Ala’anzy, Rida Gadhafi, Shadi Atalla, Wathiq Mansoor

Published May 4, 2026• 0 citations

Abstract

Quantum satellite communication (QSC) is emerging as a strategic technology for secure global networking and long-distance quantum connectivity. This review prioritizes the major challenges that still hinder large-scale deployment, including atmospheric loss, beam pointing and tracking, payload constraints, synchronization, scalability, and integration with terrestrial infrastructure. To contextualize these issues, we provide only a concise overview of the core concepts and enabling technologies behind QSC, together with representative milestones such as the Micius mission. Building on this background, the paper surveys recent advances in protocols, hybrid space--terrestrial architectures, turbulence mitigation, and AI-assisted optimization. It then examines future directions, including quantum Internet integration, daylight operation, satellite-supported repeaters, and space-based quantum computing. By centering the discussion on open technical bottlenecks and emerging research trajectories, this review aims to support researchers and engineers working toward practical and resilient QSC systems.

DOI: 10.48550/arxiv.2605.02272

Related papers

Free-space and Satellite-Based Quantum Communication: Principles, Implementations, and Challenges

Georgi Gary Rozenman, Alona Maslennikov, Sara P. Gandelman +5 more

Satellite-based quantum communications represent a critical advancement in the pursuit of secure, global-scale quantum networks. Leveraging the principles of quantum mechanics, these systems offer unparalleled security through Quantum Key Distribution (QKD) and other quantum communication protocols. This review provides a comprehensive overview of the current state of satellite-based quantum communications, focusing on the evolution from terrestrial to space-based systems. We explore the distinct advantages and challenges of discrete-variable (DV) and continuous-variable (CV) quantum communication technologies in the context of satellite deployments. The paper also discusses key milestones such as the successful implementation of quantum communication via the Micius satellite and outlines the primary challenges, including atmospheric turbulence and the development of quantum repeaters, that must be addressed to achieve a global quantum internet. This review aims to consolidate recent advancements in the field, providing insights and perspectives on the future directions and potential innovations that will drive the continued evolution of satellite-based quantum communications.

quant-pharXiv:2602.01426AVS Quantum ScienceFeb 3, 20261 citation

Trends and Challenges in Quantum Communications for Satellite Networks

Patrick Anthony, Funmi Eko Ezeh, Stephanie Onyekachi Oparah +5 more

Quantum communications represent a cutting-edge frontier in secure information exchange, with satellite networks emerging as a promising platform for their implementation. This paper provides an overview of the trends and challenges in leveraging quantum technologies for satellite communications networks. Beginning with a brief introduction to quantum communications and satellite networks, the paper delves into the fundamentals of quantum key distribution (QKD), teleportation, and entanglement, highlighting their relevance to satellite-based communication systems. The paper then explores recent advancements in quantum satellite communications, including the development and deployment of quantum satellites and the achievement of long-distance quantum communication via satellites. However, alongside these advancements come notable challenges. Technical hurdles such as atmospheric interference and signal degradation over long distances pose significant obstacles to the practical implementation of quantum communication in satellite networks. Moreover, practical challenges such as high development costs, regulatory complexities, and integration issues with existing infrastructure further complicate the adoption of quantum technologies in satellite communications. Looking ahead, the paper discusses future trends and opportunities in the field, including advancements in satellite technology, integration with 5G networks, and the expansion of quantum network applications. Despite the challenges, the potential benefits of quantum communications for satellite networks are substantial, offering unparalleled security and the ability to establish secure communication channels over vast distances. By addressing the identified challenges and leveraging emerging opportunities, quantum communications hold the promise of revolutionizing satellite networks and paving the way for a new era of secure and efficient global communication.

International Journal of Multidisciplinary Futuristic DevelopmentJan 1, 20240 citations

Space-Based Quantum Communications: A System-Level Review

Arash Kosari, Amirreza Fath

Space-based quantum key distribution (QKD) has emerged as the leading approach for establishing information-theoretically secure communication links beyond the reach of terrestrial fiber networks. Over the past decade, missions ranging from the 635 kg Micius satellite to 3U CubeSats such as SpooQy-1 have demonstrated satellite-to-ground QKD, entanglement distribution, and quantum teleportation across distances exceeding 1,200 km. However, existing reviews of these missions focus primarily on quantum protocols and link layer physics, leaving the system level engineering trade offs particularly those governing platform selection, SWaP budgets, and subsystem integration largely unexamined. This paper presents a systems engineering review of space based quantum communication missions developed between 2016 and 2025. Each mission is analyzed through a unified framework encompassing link budget decomposition, payload miniaturization trends, and Acquisition, Tracking, and Pointing (ATP) architectures. A comparative SWaP analysis reveals that payload mass has decreased by approximately one order of magnitude from ~230 kg (Micius) to ~23 kg (Jinan-1) while reported quantum bit error rates have remained below 5%. The analysis identifies three critical gaps: (i) the absence of formal Multidisciplinary Design Optimization (MDO) frameworks in quantum satellite design, (ii) the lack of standardized performance metrics for cross mission comparison, and (iii) the disconnect between constellation level network studies and subsystem level hardware constraints. Based on these findings, system-level design strategies and a technology roadmap are proposed to support the transition from single-link demonstrations to scalable, constellation-ready quantum communication infrastructures.

Sep 22, 20260 citations

Advances in space quantum communications

Jasminder S. Sidhu, Siddarth Koduru Joshi, Mustafa Gündoğan +15 more

Abstract Concerted efforts are underway to establish an infrastructure for a global quantum Internet to realise a spectrum of quantum technologies. This will enable more precise sensors, secure communications, and faster data processing. Quantum communications are a front‐runner with quantum networks already implemented in several metropolitan areas. A number of recent proposals have modelled the use of space segments to overcome range limitations of purely terrestrial networks. Rapid progress in the design of quantum devices have enabled their deployment in space for in‐orbit demonstrations. We review developments in this emerging area of space‐based quantum technologies and provide a roadmap of key milestones towards a complete, global quantum networked landscape. Small satellites hold increasing promise to provide a cost effective coverage required to realise the quantum Internet. The state of art in small satellite missions is reviewed and the most current in‐field demonstrations of quantum cryptography are collated. The important challenges in space quantum technologies that must be overcome and recent efforts to mitigate their effects are summarised. A perspective on future developments that would improve the performance of space quantum communications is included. The authors conclude with a discussion on fundamental physics experiments that could take advantage of a global, space‐based quantum network.

arXiv:2103.12749IET Quantum CommunicationJul 19, 2021272 citations

Satellites promise global-scale quantum networks

Sumit Goswami, Sayandip Dhara, Neil Sinclair +10 more

Academia, governments, and industry around the world are on a quest to build long-distance quantum communication networks for a future quantum internet. Using air and fiber channels, quantum communication quickly faced the daunting challenge of exponential photon loss with distance. Quantum repeaters were invented to solve the loss problem by probabilistically establishing entanglement over short distances and using quantum memories to synchronize the teleportation of such entanglement to long distances. However, due to imperfections and complexities of quantum memories, ground-based proof-of-concept repeater demonstrations have yet been restricted to metropolitan-scale distances. In contrast, direct photon transmission from satellites through empty space faces almost no exponential absorption loss and only quadratic beam divergence loss. A single satellite successfully distributed entanglement over more than 1,200 km. It is becoming increasingly clear that quantum communication over large intercontinental distances (e.g., 4,000–20,000 km) will likely employ a satellite-based architecture. This could involve quantum memories and repeater protocols in satellites, or memory-less satellite-chains through which photons are simply reflected, or some combination thereof. Rapid advancements in the space launch and classical satellite communications industry provide a strong tailwind for satellite quantum communication, promising economical and easier deployment of quantum communication satellites.

arXiv:2505.06693Optica QuantumNov 4, 20254 citations

Quantum Teleportation in Satellite Communications: Principles, Applications, and Operational Implications for Global Network Security

Dylan Charlton

As satellite communications continue to be an integral part of global infrastructure, they face escalating cybersecurity threats and bandwidth limitations. Traditional cryptographic methods are increasingly vulnerable due to advancements in quantum computing. Quantum teleportation, leveraging quantum entanglement and quantum key distribution, offers a transformative approach to secure satellite communications. This paper lays out the foundational principles of quantum entanglement and quantum key distribution in order to allow for a complete understanding of quantum teleportation. Key experimental milestones for quantum teleportation in space environments are also discussed, such as the Chinese Micius satellite’s achievements and Boeing’s Q4S entanglement swapping mission. The benefits and possibilities of quantum teleportation, such as reduced signal attenuation, enhanced data integrity, and bandwidth optimization are analyzed alongside technical challenges and potential limitations like atmospheric interference and system vulnerabilities. These are brought up to showcase the potential of quantum teleportation to revolutionize satellite transmissions by enhancing secure satellite communications. Current implementations, future prospects, and challenges are laid out to highlight the role of quantum teleportation in national security, data sovereignty, and establishing secure communication networks on a global, and potentially interplanetary scale.

Space Education & Strategic ApplicationsJan 1, 20260 citations