A rigorous treatment of distillable entanglement

Details A rigorous treatment of distillable entanglement A rigorous treatment of distillable entanglement

1998-09-24

arxiv.org/abs/quant-ph/9809078v2

Physics

Quantum Physics

11 pages, AMSTeX, no figures; minor corrections and clarifications 10/12/98

Scientific paper

10.1103/PhysRevA.60.173

The notion of distillable entanglement is one of the fundamental concepts of quantum information theory. Unfortunately, there is an apparent mismatch between the intuitive and rigorous definitions of distillable entanglement. To be precise, the existing rigorous definitions impose the constraint that the distilation protocol produce an output of constant dimension. It is therefore conceivable that this unnecessary constraint might have led to underestimation of the true distillable entanglement. We give a new definition of distillable entanglement which removes this constraint, but could conceivably overestimate the true value. Since the definitions turn out to be equivalent, neither underestimation nor overestimation is possible, and both definitions are arguably correct

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