This book gives an overview for practitioners and students of quantum physics and information science. It provides ready access to essential information on quantum information processing and communication, such as definitions, protocols and algorithms.

In one word, this is a responsible book; the rest is commentary. Around 1992 a few of us were led by Charles Bennett into a Garden of Eden of quantum information, communication, and computation. No sooner had we started exploring our surroundings and naming the birds and the beasts, than Peter Shor put an end to that apparent innocence by showing that factoring could be turnedby means of quantum hardwareinto a po- nomial task. Fast factoring meant business; everybody seemed to be awfully interested in factoring. Not that anyone had any use for factoring per se, but it seemed that all the world's secrets were protected by factor-keyed padlocks. Think of all the power and the glory (and something else) that you might get by acting as a consultant to big businesses and government agencies, helping them pick everyone else's locks and at the same time build unpickable ones (well, nearly unpickable) for themselves. And if one can get an exponential advantage in factoring, wouldn't an exponential advantage be lying around the corner for practically any other computational task? Quantum infor- tion and all that has indeed blossomed in a few years into a wonderful new chapter of physics, comparable in ?avor and scope to thermodynamics. It has alsoturnedintoaveritableindustryproducingpapers,conferences,exp- iments, e?ects, deviceseven proposals for quantum computer architectures.

Unlike other books in quantum information and computing, this book is intended to be concise and to the point making it useful in practical context of reading journal articles, performing research calculations or problems in graduate courses in physics and engineering Unlike shorter books, this is intended for practitioners and students in their daily investigations Brings together this information from its various sources, allows researchers and students in a broad range of areas including physics, photonics, solid-state electronics, nuclear magnetic resonance and information technology, in their applied and theoretical branches, to have this vital material directly at hand when needed

Autorentext

Dr. Jaeger is a professor at Boston University, where he earned his Ph.D. in Physics with Abner Shimony in 1995. He has published in a number of areas, including quantum computing, quantum cryptography, foundations of quantum mechanics, quantum metrology, and the history and philosophy of science. He was worked in academia and industry in the United States and Europe as a research director and investigator in quantum information science and quantum metrology. As a member of the Quantum Imaging Laboratory at Boston University's Photonics Center, along with colleagues at Harvard University and BBN Technologies, he helped build the world's first practical metropolitan area quantum cryptographic network, the DARPA Quantum Network Test-bed, serving as principal quantum entanglement theorist.

Zusammenfassung
No sooner had we started exploring our surroundings and naming the birds and the beasts, than Peter Shor put an end to that apparent innocence by showing that factoring could be turnedby means of quantum hardwareinto a po- nomial task.

Inhalt
Qubits.- Measurements and quantum operations.- Quantum nonlocality and interferometry.- Classical information and communication.- Quantum information.- Quantum entanglement.- Entangled multipartite systems.- Quantum state and process estimation.- Quantum communication.- Quantum decoherence and its mitigation.- Quantum broadcasting, copying, and deleting.- Quantum key distribution.- Classical and quantum computing.- Quantum algorithms.