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Scientia Sinica Informationis

Quantum communication:status and prospects

Husheng Wu

Published Jan 1, 2014• 1 citation
OpenAlex

Abstract

The paper overviews the fundamental principles, methods, technologies and applications of quantum communication. It introduces the basic protocol of secure quantum private communication, including the decoy method, quantum communication based on the entanglement distribution, quantum teleportation, manipulation of entangled photonspairs in polarization space. This review introduces recent status in quantum technology and applications, and attempts to discuss future directions in which the field is likely to develop.

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The paper overviews the fundamental principles, methods, technologies and applications of quantum communication. It introduces the basic protocol of secure quantum private communication, including the decoy method, quantum communication based on the entanglement distribution, quantum teleportation, manipulation of entangled photonspairs in polarization space. This review introduces recent status in quantum technology and applications, and attempts to discuss future directions in which the field is likely to develop.
The paper overviews the fundamental principles, methods, technologies and applications of quantum communication. It introduces the basic protocol of secure quantum private communication, including the decoy method, quantum communication based on the entanglement distribution, quantum teleportation, manipulation of entangled photonspairs in polarization space. This review introduces recent status in quantum technology and applications, and attempts to discuss future directions in which the field is likely to develop.
With the emergence of Quantum mechanics arrived the prospect of further development in technology. New areas of research and development came into the picture, one of them being Quantum communication. In 1991, the first protocol of Quantum cryptography and quantum non-duality attracted physicists, mathematicians, and computer scientists to explore the mysterious ways of the quantum world. Since then, quantum communication has evolved to an astonishing extent. Ultra-high-speed internet, computational power, optimization, and security have paved the way for innumerable possibilities ahead. This survey intends to investigate the concepts and applications of quantum communication. In this review article, we try to give an idea of quantum communication background by shedding light on polarization and entanglement, following which, we give a brief survey of its applications such as quantum teleportation, quantum key distribution, secure direct communication, and quantum memories. The study concludes with a discussion on the future outlook of this emerging paradigm.
Quantum communication as a vital branch of quantum information science, leverages physical properties such as quantum superposition, entanglement, and the impossibility of cloning to pioneer entirely new technical pathways for achieving unconditional secure communication. This paper comprehensively and meticulously elucidates the core technological principles of quantum communication, including quantum key distribution, quantum teleportation, and quantum secure direct communication; It also delves into its application status in critical domains such as dedicated communications, finance, and government affairs. Furthermore, it analyzes the numerous technical challenges currently faced, including the stability of quantum bits, limitations on communication distance, and difficulties in standardization. Finally, it offers a prospective outlook on its future development trends. Research indicates that quantum communication technology is progressively transitioning from the laboratory to large-scale application stages, with its integration into existing communication systems and strategic value in national security domains becoming increasingly prominent.
With the continuous advancement of quantum communication technology, the public's interest in quantum mechanics and quantum communication has been steadily increasing. However, due to the general level of knowledge and misleading popular science videos on the internet, there are significant misconceptions regarding the understanding of quantum mechanics and quantum communication technology. This study aims to enhance readers' understanding of this field by providing an accessible introduction to the fundamentals of quantum mechanics and quantum communication. This paper starts by elaborating on the basic concepts of quantum mechanics, such as wave function, eigenvalues and eigenfunctions of observables, and the superposition of eigenstates. Then, taking polarization of light as an example, the fundamental principles of quantum mechanics are explained. Subsequently, through the examples of the BB84 and B92 protocols, the working principles of quantum communication and its advantage of being secure against eavesdropping are explained. Finally, an overview of the current status and technological challenges faced by quantum communication technology is provided. It is our expectation that readers, after reading this paper, will enhance their understanding of the theoretical foundations of quantum mechanics and quantum communication, thereby avoiding being misled by erroneous information from the internet and real-life sources.
Quantum entanglement stands as one of the most intriguing phenomena in quantum mechanics, defying classical intuition and paving the way for revolutionary advancements in information processing. the fundamentals of quantum entanglement and explores its applications in quantum information processing. Beginning with a concise overview of entanglement theory, we delve into various protocols and techniques that leverage entangled states to perform tasks such as quantum teleportation, superdense coding, and quantum cryptography. Furthermore, we discuss recent developments in the field, including entanglement-based quantum key distribution schemes and entanglement swapping protocols. Through a comprehensive examination of both theoretical principles and experimental implementations, this paper elucidates the pivotal role of quantum entanglement in shaping the landscape of quantum information processing, with implications for secure communication, computational speedup, and future quantum technologies.