Designing optimum CP maps for quantum teleportation

Details Designing optimum CP maps for quantum teleportation Designing optimum CP maps for quantum teleportation

2001-05-23

arxiv.org/abs/quant-ph/0105119v1

Physics

Quantum Physics

5 pages, 1 figure

Scientific paper

10.1103/PhysRevA.64.060301

We study general teleportation scheme with an arbitrary state of the pair of particles (2 and 3) shared by Alice and Bob, and arbitrary measurements on the input particle 1 and one of the members (2) of the pair on Alice's side. We find an efficient iterative algorithm for identifying optimum local operations on Bob's side. In particular we find that simple unitary transformations on his side are not always optimal even if particles 2 and 3 are perfectly entangled. We describe the most interesting protocols in the language of extremal completely-positive maps.

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