Figure (left) reports the time evolution of the population of the excited state S 1 after photo-excitation up to 300 fs of dynamics simulated with CT-TSH (upper panel) and with TSH-ED (lower panel) and computed according to Eq. . The colored lines represent different simulation setups, from the 2D model without inclusion of the environment (dark red thick lines) to the 2D + 23BM model that includes all modes listed in Section IV (dark magenta thick lines). The bath modes are included one by one following the order given in Section IV. In the same figure (right), we show the probability of forming the trans conformer, by counting the number of trajectories such that the absolute value of the angle ϕ is larger than π/2, irrespective of the occupied electronic state.