Perspectives on Nuclear Structure and Scattering with the Ab Initio No-Core Shell Model

TL;DR

This paper reviews recent advances in nuclear structure and reaction theory using ab initio methods, highlighting the No-Core Shell Model and collaborative efforts to improve computational approaches and predictive capabilities.

Contribution

It introduces new truncation schemes in the harmonic oscillator basis and discusses collaborative developments in the No-Core Monte-Carlo Shell Model.

Findings

Development of alternative truncation schemes in the harmonic oscillator basis

Progress in the No-Core Monte-Carlo Shell Model

Enhanced predictive power with quantified uncertainties

Abstract

Nuclear structure and reaction theory are undergoing a major renaissance with advances in many-body methods, strong interactions with greatly improved links to Quantum Chromodynamics (QCD), the advent of high performance computing, and improved computational algorithms. Predictive power, with well-quantified uncertainty, is emerging from non-perturbative approaches along with the potential for new discoveries such as predicting nuclear phenomena before they are measured. We present an overview of some recent developments and discuss challenges that lie ahead. Our focus is on explorations of alternative truncation schemes in the harmonic oscillator basis, of which our Japanese--United States collaborative work on the No-Core Monte-Carlo Shell Model is an example. Collaborations with Professor Takaharu Otsuka and his group have been instrumental in these developments.