A1 Refereed original research article in a scientific journal
Bose-Hubbard lattice as a controllable environment for open quantum systems
Authors: Cosco F, Borrelli M, Mendoza-Arenas JJ, Plastina F, Jaksch D, Maniscalco S
Publisher: AMER PHYSICAL SOC
Publication year: 2018
Journal: Physical Review A
Journal name in source: PHYSICAL REVIEW A
Journal acronym: PHYS REV A
Article number: ARTN 040101
Volume: 97
Issue: 4
Number of pages: 6
ISSN: 2469-9926
DOI: https://doi.org/10.1103/PhysRevA.97.040101
Self-archived copy’s web address: https://research.utu.fi/converis/portal/Publication/30993379
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 one to simulate both Markovian and non-Markovian dynamics in a controlled and experimentally realizable 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 a superfluid and Mott insulator, respectively. Furthermore, our findings show how the excitations supported in the two phases can be characterized as information carriers.
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 one to simulate both Markovian and non-Markovian dynamics in a controlled and experimentally realizable 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 a superfluid and Mott insulator, respectively. Furthermore, our findings show how the excitations supported in the two phases can be characterized as information carriers.
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