TY - JOUR
A1 - Palm, Timo
A1 - Nalbach, Peter
T1 - Quasi-adiabatic path integral approach for quantum systems under the influence of multiple non-commuting fluctuations
T2 - The journal of chemical physics - bridges a gap between journals of physics and journals of chemistry
N2 - Quantum systems are typically subject to various environmental noise sources. Treating these environmental disturbances with a system-bath approach beyond weak coupling, one must refer to numerical methods as, for example, the numerically exact quasi-adiabatic path integral approach. This approach, however, cannot treat baths which couple to the system via operators, which do not commute. We extend the quasi-adiabatic path integral approach by determining the time discrete influence functional for such non-commuting fluctuations and by modifying the propagation scheme accordingly. We test the extended quasi-adiabatic path integral approach by determining the time evolution of a quantum two-level system coupled to two independent baths via non-commuting operators. We show that the convergent results can be obtained and agreement with the analytical weak coupling results is achieved in the respective limits.
Y1 - 2018
UR - https://whge.opus.hbz-nrw.de/frontdoor/index/index/docId/3130
SN - 1089-7690
VL - 149
IS - 21
SP - 214103
ER -