Print Email Facebook Twitter Nonconvexity of private capacity and classical environment-assisted capacity of a quantum channel Title Nonconvexity of private capacity and classical environment-assisted capacity of a quantum channel Author Elkouss Coronas, D. (TU Delft Quantum Information and Software) Strelchuk, S. (University of Cambridge) Date 2016-10-17 Abstract The capacity of classical channels is convex. This is not the case for the quantum capacity of a channel: The capacity of a mixture of different quantum channels exceeds the mixture of the individual capacities and thus is nonconvex. Here we show that this effect goes beyond the quantum capacity and holds for the private and classical environment-assisted capacities of quantum channels. To reference this document use: http://resolver.tudelft.nl/uuid:7d15ec4f-0625-48d2-b52c-a216b83dcb99 DOI https://doi.org/10.1103/PhysRevA.94.040301 ISSN 1050-2947 Source Physical Review A (Atomic, Molecular and Optical Physics), 94 (4) Part of collection Institutional Repository Document type journal article Rights © 2016 D. Elkouss Coronas, S. Strelchuk Files PDF PhysRevA.94.040301.pdf 539.39 KB Close viewer /islandora/object/uuid:7d15ec4f-0625-48d2-b52c-a216b83dcb99/datastream/OBJ/view