Production and detection of ultracold Cs ₂ molecules via four-photon adiabatic passage

Abstract

We study theoretically how to produce and detect the ultracold ground-state Cs 2 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.

Geometrical representation of coherent tunneling process in two-waveguide and three-waveguide coupler

“…Landau-Zener (LZ) non-adiabatic tunneling process and stimulated Raman adiabatic passage (STIRAP) have different physical mechanisms and have aroused wide interest during the past two decades. For instance, the former has been widely used in waveguide arrays, [1,2] electron transfer on insulating surface, [3] Bose-Einstein condensate, [4,5] Bose-Fermi mixture, [6] optical lattices, [7] radio frequency superconducting quantum interference, [8] preparation of quantum state, [9] coherent destruction of tunneling, [10] to name a few, while the latter has been used in waveguide optics, [11][12][13] population transfer in atomic and molecular physics, [14][15][16][17][18] Bose-Einstein condensate, [19,20] generation of terahertz pulses, [21] optical storage, [22] and so forth. Shore et al have discussed the differences between the STIRAP in three-level atom system and LZ tunneling process in four-state model.…”