# Nuclear response Functions with Realistic Interactions

## TL;DR

This paper calculates nuclear response functions using real-time Green's functions with realistic interactions, analyzing correlations, sum rules, and vertex corrections to improve understanding of nuclear medium responses.

## Contribution

It introduces improved calculations of nuclear response functions with realistic interactions, emphasizing the role of correlations and vertex corrections.

## Key findings

- Strong correlations significantly affect the response.
- Vertex corrections are crucial for accurate results.
- Energy weighted sum rule dependence on mean field is analyzed.

## Abstract

Linear density response functions are calculated for symmetric nuclear matter of normal density by time-evolving two-time Green's functions in real time. The feasability and convenience of this approach to this particular problem has been shown in previous publications. Calculations are here improved by using more 'realistic' interactions derived from phase-shifts by inverse scattering. Of particular interest is the effect of the strong correlations in the nuclear medium on the response. This as well as the related energy weighted sum rule, dependence on mean field and effective mass are some of the main objects of this investigation. Comparisons are made with the collision-less limit, the HF+RPA method. The importance of vertex corrections is demonstrated.