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- Title
Cold atom-molecule photoassociation: long-range interactions beyond the 1/R expansion.
- Authors
Lepers, M.; Dulieu, O.
- Abstract
We investigate theoretically the combination of first-order quadrupole-quadrupole and second-order dipole-dipole effects on the long-range electrostatic interactions between a ground-state homonuclear alkali-metal dimer and an excited alkali-metal atom. As the electrostatic energy is comparable to the dimer rotational structure, we develop a general description of the long-range interactions in the framework of the second-order degenerate perturbation theory, which allows for couplings between the dimer rotational levels. The resulting adiabatic potential energy curves exhibit avoided crossings, and cannot be expanded as the usual 1/ R series. We study in details the particular case Cs+Cs(6P). Our results are found promising to achieve photoassociation of ultracold trimers.
- Subjects
ATOM-molecule collisions; QUADRUPOLES; ALKALI metals; DIMERS; ATOMS; POTENTIAL energy surfaces; HIGH resolution spectroscopy; COLLISIONS (Nuclear physics)
- Publication
European Physical Journal D (EPJ D), 2011, Vol 65, Issue 1/2, p113
- ISSN
1434-6060
- Publication type
Article
- DOI
10.1140/epjd/e2011-20083-6