Information - Disturbance Tradeoff in the Estimation of a Unitary Transformation
Quantum Physics
2011-01-28 v2
Abstract
We address the problem of the information-disturbance trade-off associated to the estimation of a quantum transformation, and show how the extraction of information about the a black box causes a perturbation of the corresponding input-output evolution. In the case of a black box performing a unitary transformation, randomly distributed according to the invariant measure, we give a complete solution of the problem, deriving the optimal trade-off curve and presenting an explicit construction of the optimal quantum network.
Keywords
Cite
@article{arxiv.1006.5665,
title = {Information - Disturbance Tradeoff in the Estimation of a Unitary Transformation},
author = {Alessandro Bisio and Giulio Chiribella and Giacomo Mauro D'Ariano and Paolo Perinotti},
journal= {arXiv preprint arXiv:1006.5665},
year = {2011}
}
Comments
10 pages, 4 figures