The performance of quantum battery with Kerr medium

The performance of an atomic quantum battery interacting with a single cavity mode in the presence of Kerr medium is investigated. The atomic and photonic dissipations are also incorporated into the model. In the scenario without dissipation, suppressing the strength of the Kerr medium enhances both the stored energy and ergotropy. Additionally, increasing the number of photons accelerates the charging process of the battery. It is also found that the entanglement of the battery-charger system is negatively correlated with the battery’s performance. In the scenario with dissipation, the strength of the Kerr medium and the photon number do not affect the steady-state performance of the battery. The atomic decay and the cavity loss competitively influence the steady-state stored energy and ergotropy, both of which reach the maximum value when the cavity loss rate is smaller than the atomic decay rate.