Quantum Entanglement and its Applications

Nanxi Zou

Abstract Since the concept of quantum entanglement was proposed, quantum entanglement has been paid more and more attention. Especially in recent years, with the interdisciplinary and interdisciplinary development of quantum informatics, the general definition, physical properties and entanglement measurement of quantum entanglement have been comprehensively and deeply studied. Due to its nonlocality, quantum entanglement has been widely used in quantum information, especially in quantum communication. In view of the application status of quantum entanglement in quantum communication, this paper presents a survey of quantum entanglement and its application in quantum communication. In this paper, 230 staff members from 15 Chinese companies involved in quantum communication are selected as the investigation samples, and the proportion of quantum entanglement in the application is obtained, which can promote the quantum communication. The capacity, speed and security of quantum entanglement and ordinary quantum in the application of quantum communication are compared. Through the analysis, it is concluded that each index of quantum entanglement is conducive to the development of quantum communication. Quantum entanglement provides a technical guarantee for the research of quantum communication.

Franck Laloë

F.J. Duarte, T S Taylor

Quantum entanglement (QE) is one of the most, if not the most, mysterious, and yet most promising subjects of current physics. With applications in cryptographic space-to-space, space-to-earth, and fiber communications, in addition to teleportation and quantum computing, QE goes beyond fascination and into the pragmatic spheres of commerce and the military. With the growing population of engineers in need of a transparent, pragmatic, and direct introduction to QE and its applications, this book, the first of its kind, focuses on the practical mathematical tools necessary to handle QE and its requirements to design optical configurations for QE-based systems. Specific applications include satellite networks, space-to-space communications, quantum teleportation, and quantum computing. Part of IOP Series in Coherent Sources, Quantum Fundamentals, and Applications. Key features • The first and only available text on engineering for quantum entanglement. • Presents an introduction to the topic and explains the very basic physics concepts. • Provides a tour of the relevant mathematics essential to handle quantum entanglement. • Provides content to design optical configurations for optical entanglement-based systems in quantum communications and quantum computing. • Includes discussions of key practical applications such as space-to-space, fiber and satellite communications. • Presents the fascinating subject of quantum interpretations as elucidated by quantum entanglement. Video Abstract: Quantum Entanglement Engineering and Applications

F.J. Duarte, T S Taylor

Warit Asavanant, Akira Furusawa

Quantum entanglement is a fundamental resource for various quantum applications and generation of large-scale entanglement is a key quantum technology. In recent years, continuous-variable optical systems have shown promising results in this direction, thanks to deterministic generation and multiplexing via rich degrees of freedom naturally occurring in the optical system. In this paper, we review the generation and applications of multipartite optical quantum entanglement. We begin with a theoretical overview of how to represent and verify multimode continuous-variable quantum states and entanglement. Then, we discuss the multiplexing technique in time, frequency, and spatial domains, and their applications in generation of large-scale entangled states. Afterward, we review the current status and development of the basic technology used in the generation of multipartite quantum entanglement. Finally, we discuss the applications of large-scale quantum entanglement and possible future perspectives. Published by the American Physical Society 2024