“…Within the framework of MQCT, the internal molecular degrees of freedom are treated quantum mechanically using the time-dependent Schrödinger equation. Therefore, this method takes into account many quantum features of molecular rotations and vibrations, such as state quantization and zero-point energy preservation, symmetry restrictions on allowed and forbidden transitions, propensities of state-to-state transition cross sections, quantum interference effects, and several other quantum features that we keep investigating. At the same time, the translational motion of colliding partners responsible for their scattering in space is treated classically within the Ehrenfest mean-field trajectory approach. , This simplification was found to work well even for the lightest collision partners such as the He atom and H 2 molecule in a broad range of collision energies. ,,, Since the quantum treatment of scattering is avoided, the mixed quantum/classical method enables an affordable computational treatment of heavier collision partners and/or at higher collision energies, the limits when the standard full-quantum methods are not affordable computationally anymore.…”