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The short-time electron-transfer (ET) dynamics following short-pulse optical excitation is investigated for representative models by numerical reduced density-matrix calculations. The multi-level Redfield-theory equations are solved for two-site models with up to three strongly coupled reaction modes, which are weakly coupled to a dissipative environment. The so-called normal and inverted regimes...
Multi-level Redfield theory is applied to study the photoinduced dynamics at a conical intersection which is weakly coupled to a vibrational bath. Based on numerical solutions of the Redfield equations, the effect of vibrational damping on the ultrafast time-dependent electronic decay dynamics and vibrational wave-packet dynamics of the conical intersection are investigated. It is shown that such...