Ultracold atom-dimer long-range interactions beyond the $1/R^{n}$ expansion

Details Ultracold atom-dimer long-range interactions beyond the $1/R^{n}$ expansion Ultracold atom-dimer long-range interactions beyond the $1/R^{n}$ expansion

2011-02-07

arxiv.org/abs/1102.1307v1

Physics

Quantum Physics

Submitted to EPJD, special issue "Cold Quantum Matter - Achievements and Prospects"

Scientific paper

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 which allows for couplings between the dimer rotational levels. The resulting adiabatic potential energy curves, which exhibit avoided crossings, cannot be expanded on the usual $1/R^{n}$ series. We study in details the breakdown of this approximation in the particular case Cs$_{2}+$Cs. Our results are found promising in the prospect of accomplishing the photoassociation of ultracold trimers.

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