Non-monotonic population and coherence evolution in Markovian open-system dynamics
Quantum Physics
2021-06-18 v1
Abstract
We consider a simple microscopic model where the open-system dynamics of a qubit, despite being Markovian, shows features which are typically associated to the presence of memory effects. Namely, a non monotonic behavior both in the population and in the coherence evolution arises due to the presence of non-secular contributions, which break the phase covariance of the Lindbladian (semigroup) dynamics. We also show by an explicit construction how such a non-monotonic behaviour can be reproduced by a phase covariant evolution, but only at the price of inserting some state-dependent memory effects.
Cite
@article{arxiv.1903.11118,
title = {Non-monotonic population and coherence evolution in Markovian open-system dynamics},
author = {Jan F. Haase and Andrea Smirne and Susana F. Huelga},
journal= {arXiv preprint arXiv:1903.11118},
year = {2021}
}
Comments
Submitted to the proceedings of the 684. WE-Heraeus-Seminar "Advances in open systems and fundamental tests of quantum mechanics"