Quantum Communication 101

This educational booklet, developed by NASA’s Space Communications and Navigation (SCaN) program, provides an introduction to the principles of quantum physics and their applications in space communications and quantum networks. It is designed to familiarize readers with the fundamental concepts of quantum communication and to establish a foundation for understanding the scientific and technological principles of this field without relying extensively on complex mathematical equations. The booklet introduces basic concepts such as quantum states, superposition, and other principles related to quantum information, and then explores their relevance to information transfer in space environments. It also addresses the technical foundations of quantum communication links and networks, the challenges involved in their implementation, and the potential applications of these technologies in future communications systems. The significance of this booklet lies in its connection between the theoretical concepts of quantum mechanics and the engineering requirements of space communications. In this respect, it serves as an introductory and practical resource for students of electrical engineering, telecommunications, and related fields in quantum technology. It can also provide a useful starting point for more advanced studies of quantum communications and space-based quantum networks.