Double-passage mechanical cooling in a coupled optomechanical system<xref rid="cpb_28_11_114206fn1" ref-type="fn">*</xref><fn id="cpb_28_11_114206fn1"><label>*</label><p>Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. 2018MS056) and the National Natural Science Foundation of China (Grant Nos. 11605055 and 11574082).</p></fn>

Double-passage mechanical cooling in a coupled optomechanical system**

Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. 2018MS056) and the National Natural Science Foundation of China (Grant Nos. 11605055 and 11574082).

Mu Qing-Xia¹, Lang Chao¹, Zhang Wen-Zhao^{2, †}

Time evolution of the mean phonon number N_b for κ₁/ω_m = κ₂/ω_m = 0.1, γ/ω_m = 10⁻⁵, Δ₁/ω_m = Δ₂/ω_m = 1, J/ω_m = 0.02, G₁/ω_m = G₂/ω_m = 0.2, and n_th = 100. Gray area indicates the time domain that the mean phonon number N_b temporarily falls down below the threshold value 1.