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Superactivation of Bound Entanglement

Peter W. Shor·John A. Smolin·Ashish V. Thapliyal
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Abstract

We show that, in a multi-party setting, two non-distillable (bound-entangled) states tensored together can make a distillable state. This is an example of true superadditivity of distillable entanglement. We also show that unlockable bound-entangled states cannot be asymptotically unentangled, providing the first proof that some states are truly bound-entangled in the sense of being both non-distillable and non-separable asymptotically.

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Peter W. Shor, John A. Smolin, Ashish V. Thapliyal. 2002-07-10. Superactivation of Bound Entanglement. https://arxiv.org/abs/quant-ph/0005117

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