The Capacities of Quantum Information

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Quantum resources can dramatically enhance the capabilities of several parties to perform quantum information processing (QIP) tasks. An excellent example is entanglement, a quantum mechanical phenomenon in which observable physical properties of two or more spatially separated systems are correlated in a manner that has no classical analog. In quantum information science entanglement is a key resource for many QIP tasks, such as the experimentally realized quantum teleportation, and plays an important role in the emerging technologies of quantum communication, quantum computation and quantum cryptography.