Non-Markovian Quantum Dynamics in a Squeezed Reservoir
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 opti...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8946918/ https://www.ncbi.nlm.nih.gov/pubmed/35327864 http://dx.doi.org/10.3390/e24030352 |
_version_ | 1784674307349151744 |
---|---|
author | Link, Valentin Strunz, Walter T. Luoma, Kimmo |
author_facet | Link, Valentin Strunz, Walter T. Luoma, Kimmo |
author_sort | Link, Valentin |
collection | PubMed |
description | 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. |
format | Online Article Text |
id | pubmed-8946918 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-89469182022-03-25 Non-Markovian Quantum Dynamics in a Squeezed Reservoir Link, Valentin Strunz, Walter T. Luoma, Kimmo Entropy (Basel) Article 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. MDPI 2022-02-28 /pmc/articles/PMC8946918/ /pubmed/35327864 http://dx.doi.org/10.3390/e24030352 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Link, Valentin Strunz, Walter T. Luoma, Kimmo Non-Markovian Quantum Dynamics in a Squeezed Reservoir |
title | Non-Markovian Quantum Dynamics in a Squeezed Reservoir |
title_full | Non-Markovian Quantum Dynamics in a Squeezed Reservoir |
title_fullStr | Non-Markovian Quantum Dynamics in a Squeezed Reservoir |
title_full_unstemmed | Non-Markovian Quantum Dynamics in a Squeezed Reservoir |
title_short | Non-Markovian Quantum Dynamics in a Squeezed Reservoir |
title_sort | non-markovian quantum dynamics in a squeezed reservoir |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8946918/ https://www.ncbi.nlm.nih.gov/pubmed/35327864 http://dx.doi.org/10.3390/e24030352 |
work_keys_str_mv | AT linkvalentin nonmarkovianquantumdynamicsinasqueezedreservoir AT strunzwaltert nonmarkovianquantumdynamicsinasqueezedreservoir AT luomakimmo nonmarkovianquantumdynamicsinasqueezedreservoir |