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

Authors:
Nilanjana Datta;Yurii Suhov;Tony C. Dorlas
Affiliations:
Statistical Laboratory Centre for Mathematical Sciences, University of Cambridge, Cambridge, UK CB30WB;Statistical Laboratory Centre for Mathematical Sciences, University of Cambridge, Cambridge, UK CB30WB;School of Theoretical Physics, Dublin Institute for Advanced Studies, Dublin 4, Ireland
Venue:
Quantum Information Processing
Year:
2008

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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.