Production and detection of ultracold Cs₂ molecules via four-photon adiabatic passage

We study theoretically how to produce and detect the ultracold ground-state Cs₂ molecule from Feshbach state. Numerical calculations are performed by solving the quantum Liouville equation based on multilevel Bloch model. The producing efficiency reaches 55% and the detecting efficiency is 31%. The producing and detecting efficiencies are closely related to the Rabi frequencies of laser pulses. The decay of relevant electronic and vibrational states obviously reduces the producing and detecting efficiencies.