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Atom-dimer and dimer-dimer scattering in fermionic mixtures near a narrow Feshbach resonance

Identifieur interne : 006D12 ( Main/Exploration ); précédent : 006D11; suivant : 006D13

Atom-dimer and dimer-dimer scattering in fermionic mixtures near a narrow Feshbach resonance

Auteurs : J. Levinsen [Royaume-Uni, France] ; D. S. Petrov [France, Russie]

Source :

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

RBID : Pascal:12-0019038

Descripteurs français

Pascal (Inist)
- Résonance Feshbach, Collision atomique, Système fermions, Etude théorique, Problème n corps, Méthode diagrammatique, Moment cinétique, Etat lié, Constante vitesse, Energie collision, Longueur diffusion, Collision atome molécule, 0375S, 3450, 0530F.

English descriptors

KwdEn :
- Angular momentum, Atom collisions, Atom-molecule collisions, Bound state, Collision energy, Diagrammatic method, Fermion systems, Feshbach resonance, N-body problems, Rate constant, Scattering lengths, Theoretical study.

Abstract

We develop a diagrammatic approach for solving few-body problems in heteronuclear fermionic mixtures near a narrow interspecies Feshbach resonance. We calculate s-, p-, and d-wave phaseshifts for the scattering of an atom by a weakly-bound dimer. The fermionic statistics of atoms and the composite nature of the dimer lead to a strong angular momentum dependence of the atom-dimer interaction, which manifests itself in a peculiar interference of the scattered s- and p-waves. This effect strengthens with the mass ratio and is remarkably pronounced in ⁴⁰K-(⁴⁰K-⁶Li) atom-dimer collisions. We calculate the scattering length for two dimers formed near a narrow interspecies resonance. Finally, we discuss the collisional relaxation of the dimers to deeply bound states and evaluate the corresponding rate constant as a function of the detuning and collision energy.

Affiliations:

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Le document en format XML

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K-(<sup>40</sup>
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Atom-dimer and dimer-dimer scattering in fermionic mixtures near a narrow Feshbach resonance

Atom-dimer and dimer-dimer scattering in fermionic mixtures near a narrow Feshbach resonance

Source :

Descripteurs français

English descriptors

Abstract

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

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

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