Abstract Previous work (J. Phys. Chem. C 2019 , 123 , 18303) showed that excitation energy can be stored in a symmetry‐protected dark state of an open quantum battery, without losses to the environment. However, how to prepare the battery in such a state remained unresolved. This study presents a charging protocol that uses a continuous‐wave laser to excite the system from its ground state to a bright excited state just above the dark state, followed by relaxation into the target dark state. Turning off the laser after the dark state is populated preserves the stored energy indefinitely. It is also shown that different types of dephasing affect the charging process in distinct ways, with some proving detrimental while others have minimal or no impact. Overall, the results demonstrate a practical method for charging excitonic quantum batteries and show how symmetry and controlled dissipation can be used to enhance energy storage and stability.
Khodadad et al. (Thu,) studied this question.