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

Jeonghoon Park and Jun Heo
Phys. Rev. A 97, 062314 – Published 11 June 2018

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.

  • Received 11 March 2018

DOI:https://doi.org/10.1103/PhysRevA.97.062314

©2018 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Quantum Information, Science & Technology

Authors & Affiliations

Jeonghoon Park1,* and Jun Heo2,†

  • 1Smart Quantum Communication Research Center, Korea University, Seoul 02841, Korea
  • 2School of Electrical Engineering, Korea University, Seoul 02841, Korea

  • *zucht@korea.ac.kr
  • junheo@korea.ac.kr

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Issue

Vol. 97, Iss. 6 — June 2018

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