Fig. 1: Scheme of operation of \({\hat{H}}_{{{\rm{C}}}}\) as a quantum charger.
From: Dynamical blockade of a reservoir for optimal performances of a quantum battery
Green boxes, reservoir with Hamiltonian \({\hat{H}}_{{{\rm{R}}}}\) defined in Eq. (3). Red boxes, charger with Hamiltonian \({\hat{H}}_{{{\rm{C}}}}\) defined in Eq. (4). Blue boxes, QB with Hamiltonian \({\hat{H}}_{{{\rm{B}}}}\) defined in Eq. (2). a shows an efficient charging protocol where the energy is predominantly exchanged between the charger and the QB and (b) shows an inefficient charging protocol where the energy is predominantly exchanged between the charger and the reservoir. In both panels, the solid thick lines connect the two parts of the system where the dominant energy exchange occurs, while the dashed lines connect the parts where this energy exchange is small.
