Computational aspects of nuclear coupled-cluster theory

TL;DR

This paper examines the computational challenges of applying spherical coupled-cluster methods to nuclear many-body problems, demonstrating results for calcium-40 and discussing scalability issues for larger nuclei.

Contribution

It provides an analysis of computational aspects and performance scaling of coupled-cluster methods in nuclear physics, with specific results for calcium-40 using chiral interactions.

Findings

Coupled-cluster results for 40Ca ground state using N3LO interaction.

Performance and scaling challenges identified for larger nuclei.

Discussion of computational bottlenecks in extending to nuclei with mass hundreds.

Abstract

We discuss computational aspects of the spherical coupled-cluster method specific to the nuclear many-body problem. Using chiral nucleon-nucleon interaction at next-to-next-to-next-to leading order (N3LO) with cutoff Lambda = 500MeV, we present coupled-cluster results for the ground state of 40Ca. Scaling and performance studies are presented together with challenges we meet with when extending the coupled-cluster effort to nuclei mass hundred and beyond.