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Numerical Experiments on the Capacity of Quantum Channel with Entangled Input States

Susumu OSAWA, Hiroshi NAGAOKA

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Summary :

The capacity of quantum channel with product input states was formulated by the quantum coding theorem. However, whether entangled input states can enhance the quantum channel is still open. It turns out that this problem is reduced to a special case of the more general problem whether the capacity of product quantum channel exhibits additivity. In the present study, we apply one of the quantum Arimoto-Blahut type algorithms to the latter problem. The results suggest that the additivity of product quantum channel capacity always holds and that entangled input states cannot enhance the quantum channel capacity.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E84-A No.10 pp.2583-2590
Publication Date
2001/10/01
Publicized
Online ISSN
DOI
Type of Manuscript
PAPER
Category
Information Theory

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