Fidelity and the communication of quantum information

2001/07/05 by Stephen M. Barnett, Stephen M Barnett, Claire R Gilson +2 · 14 citations
Computer Science · Engineering · Physics and Astronomy · #Fidelity #High fidelity #Information theory #Measure (data warehouse) #Probability of error #Quality (philosophy) #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum channel #Quantum information #Wireless Communication Security Techniques #quant-ph

paper · pdf · doi:10.1088/0305-4470/34/35/303

published in Journal of Physics A Mathematical and General 34(35), 6755-6766 (Institute of Physics) · 11 pages, RevTeX, 3 figures(EPSF)

arxiv created 2001/07/05 · openalex publication_date 2001/08/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

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 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.

Citations

• Accessible information and optimal strategies for real symmetrical quantum sources
• Quantum State Disturbance vs. Information Gain: Uncertainty Relations for Quantum Information