Non-adiabatic reaction dynamics simulation of biomolecules responding to photons

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We carried out reaction simulations on biomolecules responding to photons, especially retinal molecules in Rhodopsin, which is responsible for our vision. We investigated differences of retinal molecules in responses to photons: how much and how fast they react. The results that we obtained are in agreement with experiments. We found that 9-cis retinal is slower and less to react than 11-cis retinal, which exists in our eyes. This is due to the trajectory trapping in an energy barrier in the excited state produced by photons.