Vertaisarvioitu alkuperäisartikkeli tai data-artikkeli tieteellisessä aikakauslehdessä (A1)

Non-Markovian Quantum Dynamics in a Squeezed Reservoir




Julkaisun tekijät: Link Valentin, Strunz Walter T, Luoma Kimmo

Kustantaja: MDPI

Julkaisuvuosi: 2022

Journal: Entropy

Tietokannassa oleva lehden nimi: ENTROPY

Lehden akronyymi: ENTROPY-SWITZ

Volyymi: 24

Julkaisunumero: 3

Sivujen määrä: 13

DOI: http://dx.doi.org/10.3390/e24030352

Verkko-osoite: https://doi.org/10.3390/e24030352

Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/69091760


Tiivistelmä
We study non-Markovian dynamics of an open quantum system system interacting with a nonstationary squeezed bosonic reservoir. We derive exact and approximate descriptions for the open system dynamics. Focusing on the spin boson model, we compare exact dynamics with Redfield theory and a quantum optical master equation for both short and long time dynamics and in non-Markovian and Markov regimes. The squeezing of the bath results in asymptotic oscillations in the stationary state, which are captured faithfully by the Redfield master equation in the case of weak coupling. Furthermore, we find that the bath squeezing direction modifies the effective system-environment coupling strength and, thus, the strength of the dissipation.

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Last updated on 2022-04-05 at 14:09