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If the carriers of information are governed by quantum mechanics, new principles for information processing apply. This graduate textbook introduces the underlying mathematical theory for quantum communication, computation and cryptography. A focus lies on the concept on quantum channels and understanding figures of merit, s.a. fidelities and entropies in the quantum world. Instructive problems and solutions help to dive into the formalism.

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Joseph Renes, ETH Zurich, Switzerland.

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