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math-ph2001
On the multiplicativity conjecture for quantum channels
G. G. Amosov, A. S. Holevo
A multiplicativity conjecture for quantum communication channels is formulated, validity of which for the values of parameter close to 1 is related to the solution of the funda…
math-ph2000
On some additivity problems in quantum information theory
G. G. Amosov, A. S. Holevo, R. F. Werner
A class of problems in quantum information theory, having an elementary formulation but still resisting solution, concerns the additivity properties of various quantities character…