The charge current I_Q is plotted as a function of plunger gate voltage U_pg at time t = 220 ps for (a) the QD system without photon cavity for cyclotron energy ħω_c ≃ 10⁻⁴ meV (blue solid), 0.34 meV (green dashed), and 0.86 meV (red dotted), and (b) the QD system with photon cavity for ħω_γ > ħω_c (blue solid), ħω_γ ≃ ħω_c (green dashed), and ħω_γ < ħω_c (red dotted), where the photon energy is ħω_γ = 0.3 meV. The bias window is Δμ = 0.1 meV, g_γ = 0.1 meV, and N_γ = 2.