Non-Markovianity and memory of the initial state
Quantum Physics
2017-08-14 v2
Abstract
We explore in a rigorous manner the intuitive connection between the non-Markovianity of the evolution of an open quantum system and the performance of the system as a quantum memory. Using the paradigmatic case of a two-level open quantum system coupled to a bosonic bath, we compute the recovery fidelity, which measures the best possible performance of the system to store a qubit of information. We deduce that this quantity is connected, but not uniquely determined, by the non-Markovianity, for which we adopt the BLP measure proposed in \cite{breuer2009}. We illustrate our findings with explicit calculations for the case of a structured environment.
Cite
@article{arxiv.1606.01185,
title = {Non-Markovianity and memory of the initial state},
author = {Margarida Hinarejos and Mari-Carmen Bañuls and Armando Pérez and Inés de Vega},
journal= {arXiv preprint arXiv:1606.01185},
year = {2017}
}
Comments
9 pages, 8 figures