Fidelity and the communication of quantum information

Abstract

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.

11 pages, RevTeX, 3 figures(EPSF)

Cited by in corpus (7)

• Maximum Confidence Quantum Measurements
• Minimum-error discrimination between three mirror-symmetric states
• Minimum-error discrimination between subsets of linearly dependent quantum states
• Verification of quantum-domain process using two non-orthogonal states
• Residual and Destroyed Accessible Information after Measurements
• Diagnosing steerability of a bipartite state with the nonsteering threshold
• Averaged fidelity-based steering criteria