Ab initio Green's functions approach for homogeneous nuclear matter

TL;DR

This paper applies an advanced ab initio Green's functions method to homogeneous nuclear matter, accurately computing its equation of state and single-particle properties using chiral effective field theory interactions.

Contribution

It introduces a combined SCGF approach with Gorkov correlations for nuclear matter, providing detailed insights into its dynamics and properties.

Findings

Good agreement with coupled-cluster EOS results

Detailed spectral functions and momentum distributions obtained

Enhanced understanding of nuclear matter interactions

Abstract

Homogeneous nuclear matter is investigated using the \textit{ab initio} Self-consistent Green's function (SCGF) approach with nuclear interactions based on chiral effective field theory. The employed method, which combines the state-of-the-art algebraic diagrammatic construction approximation at third order with Gorkov correlations, is capable of computing both the equation of state (EOS) and single-particle properties of nuclear matter. The EOS calculated with our approach and coupled-cluster theory are shown to agree very well. The one-nucleon spectral functions and the momentum distributions are discussed to gain insights into the dynamics of the interacting nuclear matter.