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Bound states of a light atom and two heavy dipoles in two dimensions

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Rosa, D. S. ; Bellotti, F. F. ; Jensen, A. S. ; Krein, G. ; Yamashita, M. T.
Número total de Autores: 5
Tipo de documento: Artigo Científico
Fonte: Physical Review A; v. 94, n. 6 DEC 30 2016.
Citações Web of Science: 1

We study a three-body system, formed by a light particle and two identical heavy dipoles, in two dimensions in the Born-Oppenheimer approximation. We present the analytic light-particle wave function resulting from an attractive zero-range potential between the light and each of the heavy particles. It expresses the large-distance universal properties which must be reproduced by all realistic short-range interactions. We calculate the three-body spectrum for zero heavy-heavy interaction as a function of light to heavy mass ratio. We discuss the relatively small deviations from Coulomb estimates and the degeneracies related to radial nodes and angular momentum quantum numbers. We include a repulsive dipole-dipole interaction and investigate the three-body solutions as functions of strength and dipole direction. Avoided crossings occur between levels localized in the emerging small and large-distance minima, respectively. The characteristic exchange of properties such as mean-square radii are calculated. Simulation of quantum information transfer is suggested. For large heavy-heavy-particle repulsion all bound states have disappeared into the continuum. The corresponding critical strength is inversely proportional to the square of the mass ratio, far from the linear dependence from the Landau criterion. (AU)

Processo FAPESP: 13/01907-0 - Centro de Pesquisa e Análise de São Paulo
Beneficiário:Sergio Ferraz Novaes
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 16/01816-2 - Transição dimensional em sistemas de poucos átomos
Beneficiário:Marcelo Takeshi Yamashita
Linha de fomento: Auxílio à Pesquisa - Regular