The nature of short-ranged correlations in nuclear systems

TL;DR

This paper investigates the short-range correlations in neutron matter using advanced many-body methods, highlighting the significant impact of induced interactions on the pair wave function and effective interactions.

Contribution

It introduces a combined approach using parquet-diagram and Fermi-hypernetted chain methods to analyze short-range structures in neutron matter, comparing with Bethe-Goldstone and variational results.

Findings

Induced interactions significantly affect short-range pair wave functions.

The methods provide consistent results with Bethe-Goldstone calculations.

Short-range correlations are strongly influenced by density, spin, and tensor fluctuations.

Abstract

We apply ideas of the parquet-diagram and optimized Fermi-hypernetted chain methods to determine the short-range structure of the pair wave function in neutron matter and compare these with Bethe-Goldstone results and those of low-order variational calculations. It is shown that the induced interaction, describing the exchange of density, spin, and tensor fluctuations, has a profound influence on the short-ranged structure of the pair wave function and, hence, on effective interactions in neutron matter.