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All bipartite entangled states are useful for information processing. (English) Zbl 1228.81104
Summary: The question of whether all entangled states can be used as a nonclassical resource has remained open so far. Here we provide a conclusive answer to this problem for the case of systems shared by two parties. We show that any entangled state \(\sigma\) can enhance the teleportation power of some other state. This holds even if the state \(\sigma\) is bound entangled.

81P45 Quantum information, communication, networks (quantum-theoretic aspects)
81P68 Quantum computation
81P15 Quantum measurement theory, state operations, state preparations
Full Text: DOI
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