Formation of deeply bound molecules via chainwise adiabatic passage

Details Formation of deeply bound molecules via chainwise adiabatic passage Formation of deeply bound molecules via chainwise adiabatic passage

2008-06-04

arxiv.org/abs/0806.0821v1

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.78.021402

We suggest and analyze a novel technique for efficient and robust creation of dense ultracold molecular ensembles in their ground rovibrational state. In our approach a molecule is brought to the ground state through a series of intermediate vibrational states via a {\em multistate chainwise Stimulated Raman Adiabatic Passage} (c-STIRAP) technique. We study the influence of the intermediate states decay on the transfer process and suggest an approach that minimizes the population of these states, resulting in a maximal transfer efficiency. As an example, we analyze the formation of $^{87}$Rb$_{2}$ starting from an initial Feshbach molecular state and taking into account major decay mechanisms due to inelastic atom-molecule and molecule-molecule collisions. Numerical analysis suggests a transfer efficiency $>$ 90%, even in the presence of strong collisional relaxation as are present in a high density atomic gas.

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