Quantum Fisher Information Flow in Non-Markovian Processes of Open Systems
Quantum Physics
2010-10-12 v5
Abstract
We propose to use the quantum Fisher information in characterizing the information flow of open quantum systems. This information-theoretic approach provides a quantitative measure to statistically distinguish Markovian and non-Markovian processes. A basic relation between the QFI flow and non-Markovianity is unveiled for quantum dynamics of open systems. For a class of time-local master equations, the exactly-analytic solution shows that the non-Markovianity is characterized by additive information sub-flows in different non-Markovian channels.
Keywords
Cite
@article{arxiv.0912.0587,
title = {Quantum Fisher Information Flow in Non-Markovian Processes of Open Systems},
author = {Xiao-Ming Lu and Xiaoguang Wang and C. P. Sun},
journal= {arXiv preprint arXiv:0912.0587},
year = {2010}
}
Comments
Final version published on Physical Review A