Atomic size zone interaction potential between two ground-state cold atoms

TL;DR

This paper derives an interaction potential equation for two ground-state cold atoms using the complex-source-point model, revealing force behavior changes at short distances.

Contribution

It introduces a novel application of the complex-source-point model to atomic interactions, removing singularities at short distances.

Findings

Force switches from electromagnetic to strong force as atoms approach.

The model removes singularities at R=0, enabling analysis of short-range interactions.

Numerical calculations illustrate the potential and force characteristics.

Abstract

The complex-source-point model are already used in the exact solution for the urtrashort pulse and nonparaxial beam. In this letter we have used the complex-source-point model to deduce the interaction potential equation for the separation R between two atoms which is comparable with the size of the atoms. We show the result and the characteristics of the numerical calculation. Since the singular point around R=0 is removed by using the complex-source-point model, so that we can obtain the result force around R=0. With the decreasing of the distance between two atoms, the force switches from the electromagnetic force to the strong force by use our equation.