Journal
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
Volume 34, Issue 35, Pages 6755-6766Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0305-4470/34/35/303
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We compare and contrast the error probability and fidelity as measures of the quality of the receiver's measurement strategy for a quantum communications system. The error probability is a measure of the ability to retrieve classical information and the fidelity measures the retrieval of quantum information. We present the optimal measurement strategies for maximizing the fidelity given a source that encodes information on the symmetric qubit-states.
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