Asymptotic model for shape resonance control of diatomics by intense non-resonant light

TL;DR

This paper develops a universal asymptotic model to control diatomic shape resonances using intense non-resonant light, leveraging long-range scattering properties and a nodal line technique for accurate resonance characterization.

Contribution

It introduces a novel asymptotic model that accounts for polarizability effects at short range and enables precise prediction of resonance features under intense non-resonant light.

Findings

Successfully models resonance energy and width.

Accurately predicts channel mixing and hybridization.

Applicable to narrow resonances.

Abstract

We derive a universal model for atom pairs interacting with non-resonant light via the polarizability anisotropy, based on the long range properties of the scattering. The corresponding dynamics can be obtained using a nodal line technique to solve the asymptotic Schr\"odinger equation. It consists in imposing physical boundary conditions at long range and vanishing of the wavefunction at a position separating inner zone and asymptotic region. We show that nodal lines which depend on the intensity of the non-resonant light can satisfactorily account for the effect of the polarizability at short range. The approach allows to determine the resonance structure, energy, width, channel mixing and hybridization even for narrow resonances.