Fig. 2
a The pump and the tunneling pulses. b The time evolutions of population P i = |a i |2 (i = 0–3). c The coherence dynamics |ρ ij |. In step I, the peak values of ℏΩ p and ℏT 2 are both 4 meV. In step II, the peak values of ℏT 2 and ℏT 3 are both 4 meV. Other parameters are δ p = ω 12 = ω 13 = 0, ℏγ 1 = 0.01 meV, and γ 2 = γ 3 = γ 4 = 10− 3 γ 1