How much a Quantum Measurement is Informative?
Abstract
The informational power of a quantum measurement is the maximum amount of classical information that the measurement can extract from any ensemble of quantum states. We discuss its main properties. Informational power is an additive quantity, being equivalent to the classical capacity of a quantum-classical channel. The informational power of a quantum measurement is the maximum of the accessible information of a quantum ensemble that depends on the measurement. We present some examples where the symmetry of the measurement allows to analytically derive its informational power.
Cite
@article{arxiv.1502.05785,
title = {How much a Quantum Measurement is Informative?},
author = {Michele Dall'Arno and Giacomo Mauro D'Ariano and Massimiliano F. Sacchi},
journal= {arXiv preprint arXiv:1502.05785},
year = {2015}
}
Comments
3 pages, 2 figures, published in the proceedings of the 11th Quantum Communication, Measurement, and Computing (QCMC) conference, Vienna, Austria, 30 July-3 August, 2012