Electric dipole polarizability: from few- to many-body systems

TL;DR

This paper reviews a computational method for calculating electric dipole polarizability across different nuclear systems, benchmarking it against exact solutions and applying it to heavier nuclei, revealing limitations of current interactions.

Contribution

It introduces and benchmarks the Lorentz integral transform coupled-cluster method for electric dipole polarizability calculations in nuclear physics.

Findings

The method accurately reproduces results for 4He.

Application to 16O shows underestimation with current chiral interactions.

Highlights the need for improved nuclear force models.

Abstract

We review the Lorentz integral transform coupled-cluster method for the calculation of the electric dipole polarizability. We benchmark our results with exact hyperspherical harmonics calculations for 4He and then we move to a heavier nucleus studying 16O. We observe that the implemented chiral nucleon-nucleon interaction at next-to-next-to-next-to-leading order underestimates the electric dipole polarizability.