Suppressing Degradation in Quantum Batteries by Electromagnetically‐Induced Transparency

Quantum batteries (QBs), as emerging quantum devices for energy storage and transfer, have attracted significant attention due to their potential to surpass classical batteries in charging efficiency and energy density. However, interactions between a QB and its environment result in decoherence, which significantly reduces its operational lifespan. In this work, the aging of QBs is proposed to be suppressed by introducing the electromagnetically‐induced transparency (EIT). Specifically, a four‐level atom is modeled as a QB with an effective two‐level system enabled by the EIT, while the photons in the cavity serve as the energy charger. By comparing the energy and extractable work of the QB with and without the EIT effect, it is demonstrated that the QBs incorporating the EIT exhibit enhanced resistance to spontaneous decay as compared to their counterparts without the EIT. It is believed that the findings may provide valuable insights and shed the light on the design principles for mitigating the degradation of the QBs.