Simple model of self-supported deformed states of isolated atoms

TL;DR

This paper introduces a simple three-body atomic model predicting stable, deformed states caused by core polarization, resembling Trojan states, without external fields.

Contribution

A novel three-body model demonstrating the existence of stable, deformed atomic states through a bootstrap polarization mechanism.

Findings

Prediction of stable deformed atomic states

Deformation caused by core polarization and electron localization

States similar to experimentally observed Trojan states

Abstract

We propose a simple three-body model of an atom in which one electron on a circular Rydberg orbit is treated as an independent particle and the remaining core electrons are collectively described as a single object. Within this model we predict the existence of stable deformed states of atoms. The deformation is generated by a bootstrap mechanism. The atomic core is polarized by the excited electron and the induced dipole moment keeps this electron localized. The deformed stable states of the atom are similar to the Trojan states observed in recent experiments. However, in the present case the breaking of the rotational symmetry does not require the presence of external fields.