Bose-Hubbard lattice as a controllable environment for open quantum systems
Quantum Physics
2018-04-18 v2 Quantum Gases
Abstract
We investigate the open dynamics of an atomic impurity embedded in a one-dimensional Bose-Hubbard lattice. We derive the reduced evolution equation for the impurity and show that the Bose-Hubbard lattice behaves as a tunable engineered environment allowing to simulate both Markovian and non-Markovian dynamics in a controlled and experimentally realisable way. We demonstrate that the presence or absence of memory effects is a signature of the nature of the excitations induced by the impurity, being delocalized or localized in the two limiting cases of superfluid and Mott insulator, respectively. Furthermore, our findings show how the excitations supported in the two phases can be characterized as information carriers.
Keywords
Cite
@article{arxiv.1706.09148,
title = {Bose-Hubbard lattice as a controllable environment for open quantum systems},
author = {Francesco Cosco and Massimo Borrelli and Juan José Mendoza-Arenas and Francesco Plastina and Dieter Jaksch and Sabrina Maniscalco},
journal= {arXiv preprint arXiv:1706.09148},
year = {2018}
}