Time Invariant Discord and Non-Markovianity
Quantum Physics
2012-08-01 v2
Abstract
We study non-Markovianity and information flow for qubits experiencing local dephasing with an Ohmic class spectrum. We demonstrate the existence of a temperature-dependent critical value of the Ohmicity parameter s for the onset of non-Markovianity and give a physical interpretation of this phenomenon by linking it to the form of the reservoir spectrum. We demonstrate that this link holds also for more general spectra. We unveil a class of initial states for which discord is forever frozen at a positive value. We connect time invariant discord to non-Markovianity and propose a physical system in which it could be observed.
Keywords
Cite
@article{arxiv.1203.6469,
title = {Time Invariant Discord and Non-Markovianity},
author = {Pinja Haikka and Tomi H. Johnson and Sabrina Maniscalco},
journal= {arXiv preprint arXiv:1203.6469},
year = {2012}
}
Comments
Significant changes to the manuscript, including new results and the addition of a new author