Activation of zero-error classical capacity in low-dimensional quantum systems

Jeonghoon Park, Jun Heo

Research output: Contribution to journalArticle

Abstract

Channel capacities of quantum channels can be nonadditive even if one of two quantum channels has no channel capacity. We call this phenomenon activation of the channel capacity. In this paper, we show that when we use a quantum channel on a qubit system, only a noiseless qubit channel can generate the activation of the zero-error classical capacity. In particular, we show that the zero-error classical capacity of two quantum channels on qubit systems cannot be activated. Furthermore, we present a class of examples showing the activation of the zero-error classical capacity in low-dimensional systems.

Original languageEnglish
Article number062314
JournalPhysical Review A
Volume97
Issue number6
DOIs
Publication statusPublished - 2018 Jun 11

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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