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This book highlights novel research work done on cold atom-based quantum networks. Given that one of the main challenges in building the quantum network is the limited entanglement distribution distance, this book presents some state-of-the-art experiments in tackling this challenge and, for the first time, establishes entanglement between quantum memories via metropolitan-scale fiber transmission. This achievement is accomplished by cooperating high-efficiency cold quantum memories, low-loss quantum frequency conversion modules, and long-fiber phase-locking techniques. In the book, the scheme design, experimental setup, data analyses, and numerous technical details are given. Therefore, it suits a broad readership that includes all students, researchers, and technicians who work in quantum information sciences.

Quantum mechanics. Quantumfield theory --- quantumfysica --- Quantum computing. --- Quantum entanglement.

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This thesis highlights research explorations in quantum contextuality with photons. Quantum contextuality is one of the most intriguing and peculiar predictions of quantum mechanics. It is also a cornerstone in modern quantum information science. It is the origin of the famous quantum nonlocality and various nonclassical paradoxes. It is also a resource for many quantum information processing tasks and even universal quantum computing. Therefore, the study of quantum contextuality not only advances the comprehension of the foundations of quantum physics, but also facilitates the practical applications of quantum information technology. In the last fifteen years, the study of quantum contextuality has developed from a purely theoretical level to a stage where direct experimental tests become amenable. However, the experimental research on contextuality at the current stage largely focuses on direct validations of some most famous predictions of contextuality, while other forms of contextuality and its practical applications in quantum information science are rarely involved. The research in this thesis is committed to bridge this gap from two directions: (1) to construct and test stronger forms of contextuality and relieve the requirements of contextuality experiments on experimental platforms, and (2) to explore the connections between contextuality and the other concepts in quantum information science and directly demonstrate the application of contextuality in broader scenarios. Specifically, the thesis have discussed the research topics about the relationship between quantum contextuality and nonlocality, the “all-versus-nothing” paradoxes from quantum contextuality, the ore- and post-selection paradoxes from quantum contextuality, and the topological protection and braiding dynamics of quantum contextuality in quasiparticle systems.

Quantum computing. --- Quantum entanglement. --- Quantum physics. --- Computer simulation. --- Mathematical physics. --- Optics. --- Angular momentum. --- Quantum Information. --- Quantum Correlation and Entanglement. --- Quantum Simulations. --- Fundamental concepts and interpretations of QM. --- Mathematical Methods in Physics. --- Angular momentum of light. --- Quantum theory.

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This book highlights the applications of continuous-variable entangled state representations in the research areas of quantum optics via the integration method within an ordered product of operators (IWOP). As a way to develop the Dirac’s symbolic method, the IWOP method has made the integration of non-commutative operators possible by arranging non-commutable operators within an ordered product symbol. It not only deals with many existent quantum optics problems but also explores new research fields. The book also establishes a theoretical framework for solving important quantum optics subjects by taking full advantage of the entangled state representations. With original methods and detailed descriptions, the book is suitable for researchers, instructors, and students interested in quantum mechanics, quantum optics, and quantum information science.

Quantum optics. --- Quantum entanglement. --- Quantum computing. --- Quantum physics. --- Quantum Optics. --- Quantum Correlation and Entanglement. --- Quantum Information. --- Quantum Physics. --- Quantum dynamics --- Quantum mechanics --- Quantum physics --- Physics --- Mechanics --- Thermodynamics --- Computation, Quantum --- Computing, Quantum --- Information processing, Quantum --- Quantum computation --- Quantum information processing --- Electronic data processing --- Entangled states (Quantum theory) --- Entanglement (Quantum theory) --- Quantum theory --- Optics --- Photons --- Quantum theory.

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By extending their voyages to all oceans from the 1760s onward, whaling vessels from North America and Europe spanned a novel net of hunting grounds, maritime routes, supply posts, and transport chains across the globe. For obtaining provisions, cutting firewood, recruiting additional men, and transshipping whale products, these highly mobile hunters regularly frequented coastal places and islands along their routes, which were largely determined by the migratory movements of their prey. American-style pelagic whaling thus constituted a significant, though often overlooked factor in connecting people and places between distant world regions during the long nineteenth century. Focusing on Africa, this book investigates side-effects resulting from stopovers by whalers for littoral societies on the economic, social, political, and cultural level. For this purpose it draws on eight local case studies, four from Africa’s west coast and four from its east coast. In the overall picture, the book shows a broad range of effects and side-effects of different forms and strengths, which it figures as a "grey undercurrent" of global history.--

HISTORY / Africa / General. --- Connectivity. --- Littoral Societies. --- Maritime History. --- Trans-Oceanic Entanglement. --- Whaling. --- subaltern Mobility. --- Whaling --- Commercial whaling --- Hunting, Whale --- Whale fisheries --- Whale hunting --- Fisheries --- History --- 1700-1999 --- Africa. --- Eastern Hemisphere