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Antilinearity in Bipartite Quantum Systems and Imperfect Quantum Teleportation
Armin Uhlmann
Antilinearity is quite natural in bipartite quantum systems. There is a one-to-one correspondence between vectors and certain antilinear maps, here called EPR-maps. Some of their p…
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…
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…
On the LOCC Classification of Bipartite Density Matrices
Patrick Hayden, Barbara M. Terhal, Armin Uhlmann
We provide a unifying framework for exact, probabilistic, and approximate conversions by local operations and classical communication (LOCC) between bipartite states. This framewor…
Quantum channels of the Einstein-Podolski-Rosen kind
Armin Uhlmann
Assume the quantum state of a bipartite system is known. The result of local von Neumann measurements can be described by maps from one subsystem to the other one. Main properties…
Entanglement of Assistance
David P. DiVincenzo, Christopher A. Fuchs, Hideo Mabuchi +3
The newfound importance of ``entanglement as a resource'' in quantum computation and quantum communication compels us to quantify it in as many distinct ways as possible. Here we e…