Characterization of distillable and activatable states using entanglement witnesses
- 10 April 2002
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 65 (4) , 042327
- https://doi.org/10.1103/physreva.65.042327
Abstract
We introduce a formalism that connects entanglement witnesses and the distillation and activation properties of a state. We apply this formalism to two cases: First, we rederive the results presented in Eggeling et al. (e-print quant-ph/0104095), namely, that one copy of any bipartite state with nonpositive partial transpose (NPPT) is either distillable, or activatable. Second, we show that there exist three-partite NPPT states, with the property that two copies can neither be distilled, nor activated.Keywords
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