Multipartite entanglement study in $fp$-shell nuclei

Abstract

In this study, we present multipartite entanglement results for the Ca and Ti isotopic chains obtained from nuclear shell-model wavefunctions. Our investigation focuses on the first excited $2^+_1$ states, which exhibit signatures of shell closures at $N=28$ and $N=32$. We calculate the 4- and 6-tangles, together with their corresponding network representations, providing a detailed picture of the underlying many-body correlations among nucleons. The primary objective of this work is to investigate the influence of shell closures on higher-order $n$-tangles, thereby gaining insight into the evolution of multipartite entanglement in medium-mass nuclei.

7 pages, 4 figures, contribution to conference proceedings of NTSE-2026 held at Indian Institute of Technology (IIT)-Roorkee, March 16-20, 2026