All entangled states are useful for information processing
Ll. Masanes
Abstract
The question 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 σ can enhance the teleportation power of some other state. This holds even if the state σ is bound entangled.
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