Dramatic paradigm shifts over the past few centuries have led to a rich landscape of options in human and machine communication. Communication today is deeply intertwined with our personal and social lives in addition to being a vital part of businesses and government operations---both overt and covert. This talk will address the evolving role that the fundamental laws of quantum physics are likely to play in giving communication yet another dimension in its richness. Quantum communication will bring about not only communication in the form as we know it, but also ensure that it is unconditionally secure as it transits through any medium. Given that information is the currency of a modern society, its security is paramount for the wellbeing of an individual, a society, a nation, or the globe as a whole. The talk will discuss the short history of quantum communication and draw upon the theoretical and experimental work that the author and his colleagues have conducted over the past few years in order to chart out the likely course of future events in the emerging age of secure communication.
Dramatic paradigm shifts over the past few centuries have led to a rich landscape of options in human and machine communication. Communication today is deeply intertwined with our personal and social lives in addition to being a vital part of businesses and government operations---both overt and covert. This talk will address the evolving role that the fundamental laws of quantum physics are likely to play in giving communication yet another dimension in its richness. Quantum communication will bring about not only communication in the form as we know it, but also ensure that it is unconditionally secure as it transits through any medium. Given that information is the currency of a modern society, its security is paramount for the wellbeing of an individual, a society, a nation, or the globe as a whole. The talk will discuss the short history of quantum communication and draw upon the theoretical and experimental work that the author and his colleagues have conducted over the past few years in order to chart out the likely course of future events in the emerging age of secure communication.
The secure communication of information plays an ever increasing role in our society today. Classical methods of encryption inherently rely on the difficulty of solving a problem such as finding prime factors of large numbers and can, in principle, be cracked by a fast enough machine. The burgeoning field of quantum communication relies on the fundamental laws of physics to offer unconditional information security. Here we introduce the key concepts of quantum superposition and entanglement as well as the no-cloning theorem that form the basis of this field. Then, we review basic quantum communication schemes with single and entangled photons and discuss recent experimental progress in ground and space-based quantum communication. Finally, we discuss the emerging field of high-dimensional quantum communication, which promises increased data rates and higher levels of security than ever before. We discuss recent experiments that use the orbital angular momentum of photons for sharing large amounts of information in a secure fashion. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Humanity’s social, economic, and technological progress could not have been made without communications infrastructure. The need to attain the sophistication of long-distance communication has grown steadily since the dawn of civilization. The modern global communications system is the single greatest infrastructural project in human history. The global telecommunications grid which uses satellites, deep-sea fiber-optic systems, Wi-Fi, Bluetooth, microwave and other radio, and optical-frequency communications networks are tremendous in coverage, unparalleled in connection, and ubiquitous in application. As we approach the middle of the 21st century, this system’s next major update will incorporate quantum communications technology. Quantum communication, in tandem with quantum computing and quantum sensing, constitutes one of the three pillars of second-generation quantum technology and promises an array of novel applications. Considering the reliable transmission of quantum information often requires the transport of individual particles of light photons through a world inundated by trillions upon trillions of photons, quantum communication systems are an engineering marvel. To provide a technological alternative for existing public-key encryption protocols, which are now susceptible to the threat posed by future quantum computing systems, nascent commercial quantum communication networks aim to realize the potential for cryptographic security provided by the laws of quantum mechanics. However, a number of obstacles must be overcome before quantum communications can be widely adopted. This study focuses on the current state of quantum communication, the promise of its prospects in the near and far future, the obstacles it faces, and the breakthroughs and applications developed by the United Arab Emirates.
Some of the most important technical advances of the 20th century were enabled by decades of fundamental scientific exploration, whose initial purpose was simply to extend human understanding. This era marked the creation and widespread usage of “classical” computers, which represent information as bits – 0 and 1. Despite the continued computational advances we have experienced over the past century, there are still many important and relevant problems that “classical” computers cannot solve. We are witnessing rapid progress in a new computing paradigm – Quantum Computing. Quantum computing takes advantage of the laws of quantum mechanics found in nature and represents a fundamental change from classical information processing. Two properties of quantum behavior – superposition and entanglement – may allow quantum computers to one day address problems intractable for today’s conventional classical machines. During this talk, Dr. Gil will give an overview of quantum computing, what it means for the future of technology, and how we can separate hype from reality.
The practical implementation of quantum information technologies requires, for the most part, highly advanced and currently experimental procedures. One exception is quantum cryptography, or quantum key distribution, which has been successfully demonstrated in many laboratories and has reached an advanced level of development. It will probably become the first commercial application of quantum information. In quantum key distribution, Alice and Bob exploit a quantum channel to create a secret shared key comprising a random string of binary digits. This key can then be used to protect a subsequent communication between them. The principal idea is that the secrecy of the key distribution is ensured by the laws of quantum physics. Proving security for practical communication systems is a challenging problem and requires techniques that are beyond the scope of this book. At a fundamental level, however, the ideas are simple and may readily be understood with the knowledge we have already acquired. Quantum cryptography is the latest idea in the long history of secure (and not so secure) communications and, if it is to develop, it will have to compete with existing technologies. For this reason we begin with a brief survey of the history and current state of the art in secure communications before turning to the possibilities offered by quantum communications. The history of cryptography is a long and fascinating one. As a consequence of the success or, more spectacularly, the failure of ciphers, wars have been fought, battles decided, kingdoms won, and heads lost. In the information age, ciphers and cryptosystems have become part of everyday life; we use them to protect our computers, to shop over the Internet, and to access our money via an ATM (automated teller machine). One of the oldest and simplest of all ciphers is the transposition or Caesarean cipher (attributed to Julius Caesar), in which the letters are shifted by a known (and secret) number of places in the alphabet. If the shift is 1, for example, then A is enciphered as B, B→C, · · ·, Y→Z, Z→A. A shift of five places leads us to make the replacements A→F, B→G, · · ·, Y→D, Z→E.
Internet just turned 50: five decades that shaped the world we live in. Indeed, Internet itself evolved astonishingly since the beginning, from a network prototype consisting of a few static nodes in the early days to a leviathan interconnecting with billions of devices half of the world’s population. Yet the fundamental assumption underlying Internet’s design – i.e., transmitting messages that can be encoded in a sequence of classical bits – remained unchanged during these five decades. But the dawn of the engineering phase of quantum technologies is challenging Internet’s fundamental assumption. Quantum devices demand for communication primitives – namely, the ability to distribute entangled states and to transmit quantum information – governed by the laws of quantum mechanics. Hence, principles and phenomena with no counterpart in classical networks require a major network-paradigm shift to harness the quantum mechanics specificities. This presentation aims at shedding light on the challenges and the open problems arising with the design of a protocol stack for the Quantum Internet.
At the beginning of the 20th century, the quantum theory, which replaced the traditional ideas about the world, brought with it a number of illogical at that time and at the same time strange for the classical worldview restrictions on the permissibility of the influence of human society on material objects. Over the past few decades, scientists from a number of countries have been discussing the creation of a cipher founded by quantum cryptography, which is based on the use of photons and the principle of their polarization for the creation of unique codes that are almost impossible to crack. Considering cryptography as a kind of art form that allows hiding secret information in a sequence of zeros and ones, it can be noted that even today quantum cryptography is in demand not only in government communications and in big business. In addition, the constant increase in the transmission speed and the reduction in the cost of implementing a number of processes allow one to hope for an increasingly widespread use of quantum cryptosystems in various fields already in the next decade. The world’s largest institutions and companies are currently engaged in work in the field of quantum cryptography that makes grounds for talking about the formation of a market segment where almost all its participants are part of such a process. The article discusses the development of quantum cryptography over the past 30 years.