TY  - JOUR
A1  - Otterpohl, Florian
A1  - Nalbach, Peter
A1  - Thorwart, Michael
T1  - Hidden Phase of the Spin-Boson Model
T2  - Physical Review Letters
N2  - 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.
Y1  - 2022
UR  - https://whge.opus.hbz-nrw.de/frontdoor/index/index/docId/4289
VL  - 2022
IS  - 129
SP  - Article Number: 120406
ER  -