Asymmetric information capacities of reciprocal pairs of quantum channels

Matteo Rosati, Vittorio Giovannetti

Research output: Contribution to journalArticleResearchpeer-review

Abstract

© 2018 American Physical Society. Reciprocal pairs of quantum channels are defined as completely positive transformations which admit a rigid, distance-preserving, yet not completely positive transformation that allows one to reproduce the outcome of one from the corresponding outcome of the other. From a classical perspective these transmission lines should exhibit the same communication efficiency. This is no longer the case in the quantum setting: explicit asymmetric behaviors are reported studying the classical communication capacities of reciprocal pairs of depolarizing and Weyl-covariant channels.
Original languageEnglish
Article number052318
JournalPhysical Review A
Volume97
Issue number5
DOIs
Publication statusPublished - 15 May 2018

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