Measuring and using non-markovianity
Quantum Physics
2016-03-02 v1
Abstract
We construct measures for the non-Markovianity of quantum evolution with a physically meaningful interpretation. We first provide a general setting in the framework of channel capacities and propose two families of meaningful quantitative measures, based on the largest revival of a channel capacity, avoiding some drawbacks of other non-Markovianity measures. We relate the proposed measures to the task of information screening. This shows that the non-Markovianity of a quantum process may be used as a resource. Under these considerations, we analyze two paradigmatic examples, a qubit in a quantum environment with classically mixed dynamics and the Jaynes-Cummings model.
Cite
@article{arxiv.1505.03503,
title = {Measuring and using non-markovianity},
author = {Carlos Pineda and Thomas Gorin and David Davalos and Diego A. Wisniacki and Ignacio Garcia-Mata},
journal= {arXiv preprint arXiv:1505.03503},
year = {2016}
}
Comments
9 pages, 6 figures