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Informationen zum Autor SANDOR IMRE is head of the Department of Telecommunications at Budapest University of Technology and Economics in Budapest, Hungary. He has published over 250 peer-reviewed papers from global journals and at international conferences including many of IEEE COMSOC-sponsored conferences. LASZLO GYONGYOSI is a PhD student and faculty member at Budapest University of Technology and Economics in Budapest, Hungary. Klappentext "Whilst classic communications solutions are gradually inching closer to capacity, a new horizon is opened by this exquisite amalgam of fundamental physics and engineering--an essential read for the radical researcher."--Prof. Lajos Hanzo, Fellow of the IEEE and IET, University of Southampton, UKAn overview of the most advanced quantum communication techniques, helping readers study and understand the properties of quantum channelsQuantum communication systems exploit the quantum nature of information, offering new possibilities and limitations for engineers when designing protocols. In the near future, advanced quantum communication and networking technologies driven by quantum information processing will revolutionize traditional methods.Advanced Quantum Communications explains quantum communication theory from an engineering viewpoint, including advanced quantum communication schemes, and provides an overview of these systems' security. It presents the fundamental theoretical results of quantum Shannon theory, along with details of advanced quantum communication protocols, with a clear mathematical and theoretical background.The book:* Explains the future's advanced quantum communication schemes* Offers a concise and up-to-date introduction to quantum channels, quantum networking, and secret quantum communication techniques* Explains why today's encrypted information will no longer be secure after the first quantum computers become available* Includes basic mathematical tools and heavily illustrated descriptions with more than 260 figures* Includes further reading sections with complete historical backgroundFor students, engineers, and experts, Advanced Quantum Communications is an ideal guide to the communication channels and methods of the Quantum Age. Zusammenfassung The authors explain quantum communication theory from an engineering(application) viewpoint including the advanced quantum communication schemes and give an overview on the security of these systems. Each section of the book addresses an area of major research of quantum information theory and quantum communication networks. Inhaltsverzeichnis PREFACE xvii CHAPTER 1 INTRODUCTION 1 1.1 Emerging Quantum Infl uences 2 1.2 Quantum Information Theory 2 1.3 Different Capacities of Quantum Channels 3 1.4 Challenges Related to Quantum Channel Capacities 5 1.5 Secret and Private Quantum Communication 6 1.6 Quantum Communications Networks 8 1.7 Recent Developments and Future Directions 9 CHAPTER 2 INTRODUCTION TO QUANTUM INFORMATION THEORY 11 2.1 Introduction 12 2.2 Basic Definitions and Formulas 15 2.3 Geometrical Interpretation of the Density Matrices 25 2.4 Quantum Entanglement 31 2.5 Entropy of Quantum States 34 2.6 Measurement of the Amount of Entanglement 43 2.7 Encoding Classical Information to Quantum States 49 2.8 Quantum Noiseless Channel Coding 54 2.9 Brief Summary 57 2.10 Further Reading 57 CHAPTER 3 THE CLASSICAL CAPACITIES OF QUANTUM CHANNELS 65 3.1 Introduction 65 3.2 From Classical to Quantum Communication Channels 73 3.3 Transmission of Classical Information over Quantum Channels 77 3.4 The Holevo-Schumacher-Westmoreland Theorem 84 3.5 Classical Communication over Quantum Channels 89 3.6 Brief Summary of Classical Capacities 98 ...