TY  - JOUR
A1  - Nalbach, Peter
T1  - Crossing time in the dissipative Landau-Zener quantum dynamics
T2  - The European Physical Journal B
N2  - We study the dynamics of a quantum two-state system driven through an avoided crossing under the influence of a super-Ohmic environment. We determine the Landau–Zener probability employing the numerical exact quasi-adiabatic path integral and a Markovian weak coupling approach. Increasing the driving time in the numerical protocol, we find converged results which shows that super-Ohmic environments only influence the Landau Zener probability within a finite crossing time window. This crossing time is qualitatively determined by the environmental cut-off energy. At weak coupling, we show that the Markovian weak coupling approach provides an accurate description. Since pure dephasing of a super-Ohmic bath is non-Markovian, this highlights that pure dephasing hardly influences the Landau–Zener probability. The finite crossing time window, thus, results from the suppression of relaxation once the energy splitting exceeds the environmental cut-off energy.
Y1  - 2022
UR  - https://whge.opus.hbz-nrw.de/frontdoor/index/index/docId/4287
VL  - 2022
IS  - 41
SP  - Article number: 41
ER  -