Quantum (exact) results from Fig. show that after around 80 fs of dynamics in the excited state, the photoexcited wavepacket reaches the CIs and starts transferring population to the ground state. At the same time, the trans configuration is being formed as the wavepacket FIG. . Left: Population of the electronic excited state S1 as function of time from quantum dynamics (Exact, in red), CT-MQC (in blue), CT-TSH (in orange and in green), and TSH-ED (in black). For CT-MQC only the quantum (q.) estimate of the population is accessible, whereas for CT-TSH we compare the quantum (q.) and the classical (cl.) expressions, as defined in the text. For TSH-ED, only the classical (cl.) estimate is shown. Right: Probability of finding the system in the trans configuration as function of time from quantum dynamics (Exact, in red), CT-MQC (in blue), CT-TSH (in orange), TSH-ED (in black), and quantum trajectories (in lilac).