Artículos de revistas
Bound states of a light atom and two heavy dipoles in two dimensions
Fecha
2016-12-30Registro en:
Physical Review A. College Pk: Amer Physical Soc, v. 94, n. 6, 10 p., 2016.
2469-9926
10.1103/PhysRevA.94.062707
WOS:000390962900005
WOS000390962900005.pdf
Autor
Universidade Estadual Paulista (Unesp)
Aarhus Univ
Institución
Resumen
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.