Lossless Quantum Data Compression and Secure Direct Communication
Kim Joris Boström
Broschiertes Buch

Lossless Quantum Data Compression and Secure Direct Communication

New concepts and methods for quantum information theory

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Revision with unchanged content. Quantum mechanics has radically changed our classical conception of information and communication. The elementary unit of information, the "bit", is replaced by the "qubit" which is a superposition of zero and one. Several qubits can be entangled among each other so that each qubit alone is neither zero nor one, nor any superposition of it. If qubits are used to encode messages then these "quantum messages" do not behave like ordinary ones. They cannot be compressed without loss of information, and the process of reading disturbs their content. Such apparent we...