Comment on "Noise and Disturbance in Quantum Measurements: An Information-Theoretic Approach"
Quantum Physics
2014-03-04 v1
Abstract
In this comment on the work of F. Buscemi, M.J.W. Hall, M. Ozawa and M.M. Wilde [PRL 112, 050401, 2014, arXiv:1310.6603], we point out a misrepresentation of measures of error and disturbance introduced in our recent work [PRL 111, 160405, 2013, arXiv:1306.1565] as being "purely formal, with no operational counterparts". We also exhibit an tension in the authors' message, in that their main result is an error-disturbance relation for state-independent measures, but its importance is declared to be limited to discrete variables. In contrast, we point out the separate roles played by such relations for either state-dependent or state-independent measures of error and disturbance.
Keywords
Cite
@article{arxiv.1403.0368,
title = {Comment on "Noise and Disturbance in Quantum Measurements: An Information-Theoretic Approach"},
author = {P. Busch and P. Lahti and R. F. Werner},
journal= {arXiv preprint arXiv:1403.0368},
year = {2014}
}