Figure 4

Single-atom monochromatic (blue) and polychromatic (red/green) dynamics of a ⁸⁷Sr atom on the \(^{1}S_{0}{-}^{3} P_{1}\) transition for different initial conditions. Used here is comb (B) with \(N=10\) and \(P=100~\text{mW}\), \(\sigma _{\text{beam}} = 5~\text{mm}\) (hence \(\Omega _{T}=4.8\text{MHz}\)). When starting the polychromatic dynamics in the ground state (red dashed), spontaneous emission is enhanced over the monochromatic case due to the atom’s plateauing in the excited state. Conversely, when starting in the excited state (green), the atom spends very little time in it, resulting in reduced spontaneous emission