Cold atom-molecule photoassociation: long-range interactions beyond the 1/Rn expansion
Identifieur interne : 007114 ( Main/Merge ); précédent : 007113; suivant : 007115Cold 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.
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.
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Pascal:12-0019050Le document en format XML
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<term>Cold molecules</term>
<term>Electrostatic interaction</term>
<term>Ground states</term>
<term>Long range interaction</term>
<term>Perturbation theory</term>
<term>Photoassociation</term>
<term>Potential energy curve</term>
<term>Radiation assisted collision</term>
<term>Rotational-vibrational states</term>
<term>Theoretical study</term>
<term>Ultracold molecules</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Photoassociation</term>
<term>Interaction longue distance</term>
<term>Interaction électrostatique</term>
<term>Atome froid</term>
<term>Etude théorique</term>
<term>Théorie perturbation</term>
<term>Courbe potentiel</term>
<term>Croisement évité</term>
<term>Etat fondamental</term>
<term>Etat rovibrationnel</term>
<term>Molécule ultrafroide</term>
<term>Métal alcalin</term>
<term>Collision atome molécule</term>
<term>Collision sous rayonnement</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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