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quant-ph2003★ 1 cited
Quantum information transfer from one system to another one
Armin Uhlmann
The topics of the paper are: a) Some anti-linear maps governing EPR tasks if no reference bases are distinguished. b) Imperfect teleportation and the composition rule. The ancilla…
quant-ph2003
Concurrence and foliations induced by some 1-qubit channels
Armin Uhlmann
We start with a short introduction to the roof concept. An elementary discussion of phase-damping channels shows the role of anti-linear operators in representing their concurrence…