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Bose-Hubbard lattice as a controllable environment for open quantum systems
Tekijät: Cosco F, Borrelli M, Mendoza-Arenas JJ, Plastina F, Jaksch D, Maniscalco S
Kustantaja: AMER PHYSICAL SOC
Julkaisuvuosi: 2018
Journal: Physical Review A
Tietokannassa oleva lehden nimi: PHYSICAL REVIEW A
Lehden akronyymi: PHYS REV A
Artikkelin numero: ARTN 040101
Vuosikerta: 97
Numero: 4
Sivujen määrä: 6
ISSN: 2469-9926
DOI: https://doi.org/10.1103/PhysRevA.97.040101
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/Publication/30993379
Tiivistelmä
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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