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The storage and transfer of energy through quantum batteries are key elementsin quantum networks. Here, we propose a charger design based on transitionlessquantum driving (TQD), which allows for inherent control over the batterycharging time, with the speed of charging coming at the cost of the internalenergy available to implement the dynamics. Moreover, the TQD-based charger isalso shown to be locally stable, which means that the charger can bedisconnected from the quantum battery (QB) at any time after the energytransfer to the QB, with no fully energy backflow to the charger. This providesa highly charged QB in an always-on asymptotic regime. We illustrate therobustness of the QB charge against time fluctuations and the full control overthe evolution time for a feasible TQD-based charger.

Charging power and stability of always-on transitionless driven quantum batteries