# Nonperturbative theory for the dispersion self-energy of atoms

**Priyadarshini Thiyam, C. Persson, I. Brevik, Bo E. Sernelius, and Mathias Boström**

** **

**Phys. Rev. A 90, 054502 (2014) – Published 14 November 2014**

DOI : http://dx.doi.org/10.1103/PhysRevA.90.054502

We go beyond the approximate series expansions used in the dispersion theory of finite-size atoms. We demonstrate that a correct, and nonperturbative, theory dramatically alters the dispersion self-energies of atoms. The nonperturbed theory gives as much as 100% corrections compared to the traditional series-expanded theory

for the smaller noble gas atoms.

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11/25/14