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Quantum Information Processing

, Volume 7, Issue 6, pp 251–262 | Cite as

Entanglement assisted classical capacity of a class of quantum channels with long-term memory

  • Nilanjana Datta
  • Yurii Suhov
  • Tony C. Dorlas
Article

Abstract

In this paper we evaluate the entanglement assisted classical capacity of a class of quantum channels with long-term memory, which are convex combinations of memoryless channels. The memory of such channels can be considered to be given by a Markov chain which is aperiodic but not irreducible. This class of channels was introduced by Datta and Dorlas in (J. Phys. A, Math. Theor. 40:8147–8164, 2007), where its product state capacity was evaluated.

Keywords

Quantum channels with long-term memory Entanglement assisted classical capacity 

PACS

03.67.-a 

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.Statistical Laboratory Centre for Mathematical SciencesUniversity of CambridgeCambridgeUK
  2. 2.School of Theoretical PhysicsDublin Institute for Advanced StudiesDublin 4Ireland

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