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Characterization of distillable and activatable states using entanglement witnesses

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons60636

Kraus,  B.
Theory, Max Planck Institute of Quantum Optics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons60441

Cirac,  J. Ignacio
Theory, Max Planck Institute of Quantum Optics, Max Planck Society;

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Zitation

Kraus, B., Lewenstein, M., & Cirac, J. I. (2002). Characterization of distillable and activatable states using entanglement witnesses. Physical Review A, 65(4): 042327. 042327. Retrieved from http://link.aps.org/abstract/PRA/v65/e042327.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-C227-6
Zusammenfassung
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. ©2002 The American Physical Society