Designing optimum completely positive maps for quantum teleportation
- Author(s)
- Jaroslav Rehacek, Zdenek Hradil, Jaromir Fiurasek, Caslav Brukner
- Abstract
We study a 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 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. © 2001 The American Physical Society.
- Organisation(s)
- External organisation(s)
- Palacký University Olomouc (UP)
- Journal
- Physical Review A
- Volume
- 64
- ISSN
- 1050-2947
- DOI
- https://doi.org/10.1103/PhysRevA.64.060301
- Publication date
- 2001
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103026 Quantum optics
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/designing-optimum-completely-positive-maps-for-quantum-teleportation(5ed2337f-5a64-4c70-a1a8-20435ee43ba2).html