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Cold atom-molecule photoassociation: long-range interactions beyond the 1/Rn expansion

Identifieur interne : 006C55 ( Main/Exploration ); précédent : 006C54; suivant : 006C56

Cold atom-molecule photoassociation: long-range interactions beyond the 1/Rn expansion

Auteurs : M. Lepers [France] ; O. Dulieu [France]

Source :

The European physical journal. D, Atomic, molecular and optical physics : (Print) [ 1434-6060 ] ; 2011.

RBID : Pascal:12-0019050

Descripteurs français

Pascal (Inist)
- Photoassociation, Interaction longue distance, Interaction électrostatique, Atome froid, Etude théorique, Théorie perturbation, Courbe potentiel, Croisement évité, Etat fondamental, Etat rovibrationnel, Molécule ultrafroide, Métal alcalin, Collision atome molécule, Collision sous rayonnement, 3450R, 3380P, 3115M, Molécule froide.

English descriptors

KwdEn :
- Alkali metals, Atom-molecule collisions, Avoided crossing, Cold atom, Cold molecules, Electrostatic interaction, Ground states, Long range interaction, Perturbation theory, Photoassociation, Potential energy curve, Radiation assisted collision, Rotational-vibrational states, Theoretical study, Ultracold molecules.

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/Rⁿ series. We study in details the particular case Cs₂+Cs(6²P). Our results are found promising to achieve photoassociation of ultracold trimers.

Affiliations:

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Le document en format XML

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<term>Electrostatic interaction</term>
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<front><div type="abstract" xml:lang="en">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<sup>n</sup>
 series. We study in details the particular case Cs<sub>2</sub>
+Cs(6<sup>2</sup>
P). Our results are found promising to achieve photoassociation of ultracold trimers.</div>
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Cold atom-molecule photoassociation: long-range interactions beyond the 1/Rn expansion

Cold atom-molecule photoassociation: long-range interactions beyond the 1/Rn expansion

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri