Photoassociation of a cold atom-molecule pair II: second order perturbation approach

Abstract

The electrostatic interaction between an excited atom and a diatomic ground state molecule in an arbitrary rovibrational level at large mutual separations is investigated with a general second-order perturbation theory, in the perspective of modeling the photoassociation between cold atoms and molecules. We find that the combination of quadrupole-quadrupole and van der Waals interactions compete with the rotational energy of the dimer, limiting the range of validity of the perturbative approach to distances larger than 100 a.u.. Numerical results are given for the long-range interaction between Cs and Cs${}_2$, showing that the photoassociation is probably efficient whatever the Cs${}_2$ rotational energy.

6 figures, 2 tables

References in corpus (4)

• Quantum Gas of Deeply Bound Ground State Molecules
• Calculations of static dipole polarizabilities of alkali dimers. Prospects for alignment of ultracold molecules
• Dispersion interactions and reactive collisions of ultracold polar molecules
• Photoassociation of a cold atom-molecule pair: long-range quadrupole-quadrupole interactions

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