“…In chemistry, physics, biology, and materials science, many important processes (e.g. proton transfer 1,2 , charge transport 3,4 , exciton diffusion 5,6 , energy relaxation 7,8 , and singlet fission 9,10 ) all belong to the category of nonadiabatic dynamics. Due to the presence of quantum transitions, the traditional Born-Oppenheimer approximation is no longer valid, and the electronic and nuclear dynamics are strongly coupled.…”