Entanglement Distillation for Mixed States Using Particle Statistics

Experimental entanglement distillation of mesoscopic quantum states

Ruifang Dong, Mikael Lassen, 2 Joel Heersink, Christoph Marquardt, Radim Filip, 3 Gerd Leuchs, and Ulrik L. Andersen 2 Institut für Optik, Information und Photonik, Max-Planck Forschungsgruppe, Universität Erlangen-Nürnberg, Günther-Scharowsky-Str. 1, 91058, Erlangen, Germany Department of Physics, Technical University of Denmark, Building 309, 2800 Lyngby, Denmark Department of Optics, Palacký...

Optimal entanglement criterion for mixed quantum states.

We develop a strong and computationally simple entanglement criterion. The criterion is based on an elementary positive map Phi which operates on state spaces with even dimension N > or = 4. It is shown that Phi detects many entangled states with a positive partial transposition (PPT) and that it leads to a class of optimal entanglement witnesses. This implies that there are no other witnesses ...

Bounding Polynomial Entanglement Measures for Mixed States

Teleportation and Entanglement Distillation in the Presence of Correlation among Bipartite Mixed States

The teleportation channel associated with an arbitrary bipartite state denotes the map that represents the change suffered by a teleported state when the bipartite state is used instead of the ideal maximally entangled state for teleportation. This work presents and proves an explicit expression of the teleportation channel for the teleportation using Weyl’s projective unitary representation of...

Optimal Entanglement Enhancement for Mixed States

We consider the actions of protocols involving local quantum operations and classical communication (LQCC) on a single system consisting of two separated qubits. We give a complete description of the orbits of the space of states under LQCC and characterise the representatives with maximal entanglement of formation. We thus obtain a LQCC entanglement concentration protocol for a single given st...