Multipartite secret key distillation and bound entanglement

Distillation and bound entanglement

Entanglement of assistance and multipartite state distillation

John A. Smolin,* Frank Verstraete, and Andreas Winter IBM T. J. Watson Research Center, Yorktown Heights, New York 10598, USA Institute for Quantum Information, Caltech 107-81, Pasadena, California 91125, USA Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str.1, 85748 Garching, Germany Department of Mathematics, University of Bristol, University Walk, Bristol BS8 1TW, United Kingdom Rece...

On bound entanglement assisted distillation

We investigate asymptotic distillation of entanglement in the presence of an unlimited amount of bound entanglement for bi-partite systems. We show that the distillability is still bounded by the relative entropy of entanglement. This offers a strong support to the fact that bound entanglement does not improve distillation of entanglement. PACS number(s): 03.65.Bz, 89.70.+c,89.80.+h keywords: e...

Quantum cryptography and secret-key distillation

Quantum cryptography (or quantum key distribution) is a state-of-the-art technique that exploits the properties of quantum mechanics to guarantee the secure exchange of secret keys. This self-contained text introduces the principles and techniques of quantum cryptography, setting it in the wider context of cryptography and security, with specific focus on secret-key distillation. The book start...

Distillation of multipartite entanglement by complementary stabilizer measurements.

We propose a scheme of multipartite entanglement distillation driven by a complementary pair of stabilizer measurements to distill directly a wider range of states beyond the stabilizer code states (such as the Greenberger-Horne-Zeilinger states). We make our idea explicit by constructing a recurrence protocol for the 3-qubit state [formula: see text]. Noisy states resulting from typical decohe...