Competition between memory-keeping and memory-erasing decoherence channels
Quantum Physics
2015-06-17 v1
Abstract
We study the competing effects of simultaneous Markovian and non-Markovian decoherence mechanisms acting on a single spin. We show the existence of a threshold in the relative strength of such mechanisms above which the spin dynamics becomes fully Markovian, as revealed by the use of several non-Markovianity measures. We identify a measure-dependent nested structure of such thresholds, hinting at a causality relationship amongst the various non-Markovianity witnesses used in our analysis. Our considerations are then used to argue the unavoidably non-Markovian evolution of a single-electron quantum dot exposed to both intrinsic and Markovian technical noise, the latter of arbitrary strength.
Cite
@article{arxiv.1311.2045,
title = {Competition between memory-keeping and memory-erasing decoherence channels},
author = {Tony J. G. Apollaro and Salvatore Lorenzo and Carlo Di Franco and Francesco Plastina and Mauro Paternostro},
journal= {arXiv preprint arXiv:1311.2045},
year = {2015}
}