Figure 3

The time evolution of occupations on states \(\vert 1\rangle \), \(\vert 2\rangle \) and \(\vert 3\rangle \) under the driving protocol in Eq. (28a)–(28b). (a), (c), (e) The occupation on state \(\vert 2\rangle \), namely \(\rho _{22}\), as a function of time t, where the gray solid lines from darker to lighter correspond to \(\gamma =0,2,4\) in (a), to \(\Omega _{0}=2,4,6\) in (c) and to \(T_{0}=40{,}120{,}200\) in (e). (b), (d), (f) The green solid lines corresponding to the left axis show \(\rho _{11}\) as a function of t with \(\gamma =0,2,4\) in (b), \(\Omega _{0}=2,4,6\) in (d) and \(T_{0}=40{,}120{,}200\) in (f), while blue solid lines from darker to lighter corresponding to the right axis show the evolution of \(\rho _{33}\) under the same conditions. The other parameters used are \(\gamma =2\), \(\Omega _{0}=2\), \(T_{0}=40\) if not particularly specified