Hidden Phase of the Spin-Boson Model
- A quantum two-level system immersed in a sub-Ohmic bath experiences enhanced low-frequency quantum statistical fluctuations which render the nonequilibrium quantum dynamics highly non-Markovian. Upon using the numerically exact time-evolving matrix product operator approach, we investigate the phase diagram of the polarization dynamics. In addition to the known phases of damped coherent oscillatory dynamics and overdamped decay, we identify a new third region in the phase diagram for strong coupling showing an aperiodic behavior. We determine the corresponding phase boundaries. The dynamics of the quantum two-state system herein is not coherent by itself but slaved to the oscillatory bath dynamics.
Author: | Florian Otterpohl, Peter Nalbach, Michael Thorwart |
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DOI: | https://doi.org/https://doi.org/10.1103/PhysRevLett.129.120406 |
Parent Title (English): | Physical Review Letters |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2023/12/19 |
Date of first Publication: | 2022/09/16 |
Publishing Institution: | Westfälische Hochschule Gelsenkirchen Bocholt Recklinghausen |
Release Date: | 2024/01/10 |
Volume: | 2022 |
Issue: | 129 |
First Page: | Article Number: 120406 |
Departments / faculties: | Fachbereiche / Wirtschaft und Informationstechnik Bocholt |
Licence (German): | Es gilt das Urheberrechtsgesetz |