Premium
Quantum measurement and information
Author(s) -
Hradil Z.,
Řeháček J.
Publication year - 2003
Publication title -
fortschritte der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.469
H-Index - 71
eISSN - 1521-3978
pISSN - 0015-8208
DOI - 10.1002/prop.200310019
Subject(s) - fisher information , quantum state , inverse , mathematics , invariant (physics) , norm (philosophy) , matrix norm , matrix (chemical analysis) , quantum information , quantum , computer science , pure mathematics , statistics , quantum mechanics , physics , eigenvalues and eigenvectors , mathematical physics , political science , law , geometry , materials science , composite material
The operationally defined invariant information introduced by Brukner and Zeilinger is related to the problem of estimation of quantum states. It quantifies how the estimated states differ in average from the true states in the sense of Hilbert‐Schmidt norm. This information evaluates the quality of the measurement and data treatment adopted. Its ultimate limitation is given by the trace of inverse of Fisher information matrix.