Study of the Distillability of Werner States Using Entanglement Witnesses and Robust Semidefinite Programs

Details Study of the Distillability of Werner States Using Entanglement Witnesses and Robust Semidefinite Programs Study of the Distillability of Werner States Using Entanglement Witnesses and Robust Semidefinite Programs

2006-08-11

arxiv.org/abs/quant-ph/0608095v1

Physical Review A, 74, 052306 (2006)

Physics

Quantum Physics

16 pages, 2 figures

Scientific paper

10.1103/PhysRevA.74.052306

We use Robust Semidefinite Programs and Entanglement Witnesses to study the distillability of Werner states. We perform exact numerical calculations which show 2-undistillability in a region of the state space which was previously conjectured to be undistillable. We also introduce bases which yield interesting expressions for the {\em distillability witnesses} and for a tensor product of Werner states with arbitrary number of copies.

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