Recent advancements in science focus on leveraging quantum phenomena to enhance the performance of classical information processing devices. The potential of quantum computers and communication systems is widely recognized, as they promise to fundamentally transform our information infrastructure, leading to significant improvements in efficiency and capabilities.
Focusing on the critical need for secure communication with underwater vehicles, this book explores the potential of optical channels for establishing robust links during long missions. It addresses the challenges posed by traditional RF and acoustic methods and proposes a solution using quantum key distribution for enhanced security. The text reviews underwater communication systems, delves into the physics of signal propagation in various oceanic conditions, and provides detailed discussions on system design, noise analysis, and performance simulations.
This book offers a concise review of quantum radar theory. Our approach is pedagogical, making emphasis on the physics behind the operation of a hypothetical quantum radar. We concentrate our discussion on the two major models proposed to date: interferometric quantum radar and quantum illumination. In addition, this book offers some new results, including an analytical study of quantum interferometry in the X-band radar region with a variety of atmospheric conditions, a derivation of a quantum radar equation, and a discussion of quantum radar jamming. This book assumes the reader is familiar with the basic principles of non-relativistic quantum mechanics, special relativity, and classical electrodynamics. Our discussion of quantum electrodynamics and its application to quantum radar is brief, but all the relevant equations are presented in the text. In addition, the reader is not required to have any specialized knowledge on classical radar theory. Table of Contents: Introduction / The Photon / Photon Scattering / Classical Radar Theory / Quantum Radar Theory / Quantum Radar Cross Section / Conclusions