Application of density functional theory to line broadening: Cs atoms in liquid helium

Details Application of density functional theory to line broadening: Cs atoms in liquid helium Application of density functional theory to line broadening: Cs atoms in liquid helium

2001-10-09

arxiv.org/abs/physics/0110032v2

Phys.Rev.A65:032512,2002

Physics

Atomic Physics

14 pages, 5 figures, RevTex4

Scientific paper

10.1103/PhysRevA.65.032512

We test the applicability of density functional theory (DFT) to spectral perturbations taking an example of a Cs atom surrounded by superfluid helium. The atomic DFT of helium is used to obtain the distribution of helium atoms around the impurity atom, and the electronic DFT is applied to the excitations of the atom, averaging over the ensemble of helium configurations. The shift and broadening of the D1 and D2 absorption lines are quite well reproduced by theory, suggesting that the DFT may be useful for describing spectral perturbations in more complex environments.

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