Hybridization of tensor-optimized and high-momentum antisymmetrized molecular dynamics for light nuclei with bare interaction

TL;DR

This paper introduces HM-TOAMD, a novel hybrid framework combining tensor-optimized AMD and high-momentum AMD to accurately describe light nuclei with bare interactions, capturing tensor and short-range correlations.

Contribution

The paper presents a new hybrid method, HM-TOAMD, that effectively incorporates many-body correlations and high-momentum pairs for ab initio nuclear structure calculations.

Findings

Successfully reproduces energy and radius of 3H nucleus

Effectively describes tensor force and short-range repulsion effects

Demonstrates convergence and flexibility of the new method

Abstract

Many-body correlations play an essential role in the ab initio description of nuclei with nuclear bare interactions. We propose a new framework to describe light nuclei by the hybridization of the tensor-optimized antisymmetrized molecular dynamics (TOAMD) and the high-momentum AMD (HM-AMD), which we call "HM-TOAMD". In this framework, we describe the many-body correlations in terms of not only the correlation functions in TOAMD, but also the high-momentum pairs in the AMD wave function. With the bare nucleon-nucleon interaction AV8', we sufficiently reproduce the energy and radius of the 3H nucleus in HM-TOAMD. The effects of tensor force and short-range repulsion in the bare interaction are nicely described in this new framework. We also discuss the convergence in calculation and flexibility of the model space for this new method.