Fidelity and the communication of quantum information

Details Fidelity and the communication of quantum information Fidelity and the communication of quantum information

2001-07-05

arxiv.org/abs/quant-ph/0107024v1

J. Phys. A: Math. Gen. 34(35), 6755 (2001).

Physics

Quantum Physics

11 pages, RevTeX, 3 figures(EPSF)

Scientific paper

10.1088/0305-4470/34/35/303

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 {\it classical} information and the fidelity measures the retrieval of {\it quantum} information. We present the optimal measurement strategies for maximising the fidelity given a source that encodes information on the symmetric qubit-states.

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