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Non-additivity of quantum capacity for multiparty communication channels

W. Dür, J. I. Cirac, P. Horodecki

quant-pharXiv:quant-ph/0403068

Abstract

We investigate multiparty communication scenarios where information is sent from several sender to several receivers. We establish a relation between the quantum capacity of multiparty communication channels and their distillability properties which enables us to show that the quantum capacity of such channels is not additive.

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