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Résumé |
Non-Markovian Langevin approach is applied to study the dynamics of
fermionic (bosonic) subsystem, linearly coupled to fermionic (bosonic)
environment. The analytical expressions for occupation numbers in two
different type of couplings (RWA -”rotating wave approximation” and FC
”fully coupled”) are compared and discussed. The weak coupling, high and
low temperature limits are considered as well. The sameness of the
results, obtained with both Langevin approach and Discretized Environment
Method are shown. Short and long time non-equilibrium dynamics of
fermionic and bosonic open quantum systems are analyzed both analytically and
numerically. The conditions under which the environment imposes its
thermal equilibrium to the system are discussed. |
