Configuration Interactions Constrained by Energy Density Functionals

TL;DR

This paper introduces a novel method combining configuration interaction with energy-density-functional constraints, enabling accurate nuclear energy spectra and correlation energies, bridging EDF and configuration interaction approaches.

Contribution

It presents a unified Hamiltonian construction method constrained by EDF energies, improving nuclear structure calculations beyond single-Slater determinants.

Findings

Reproduces EDF binding energies with single-Slater determinants.

Provides accurate energy spectra and correlation energies for nuclei above 208Pb.

Incorporates three-body and density-dependent terms for nuclear saturation.

Abstract

A new method for constructing a Hamiltonian for configuration interaction calculations with constraints to energies of spherical configurations obtained with energy-density-functional (EDF) methods is presented. This results in a unified model that reproduced the EDF binding-energy in the limit of single-Slater determinants, but can also be used for obtaining energy spectra and correlation energies with renormalized nucleon-nucleon interactions. The three-body and/or density-dependent terms that are necessary for good nuclear saturation properties are contained in the EDF. Applications to binding energies and spectra of nuclei in the region above 208Pb are given.