Entanglement in few-nucleon scattering events

TL;DR

This paper explores spin entanglement in few-nucleon scattering, analyzing how different interactions influence entanglement power across various nucleon and deuteron scattering processes.

Contribution

It introduces a comprehensive analysis of entanglement power in nucleon and deuteron scattering, including Coulomb effects, revealing the absence of universal low-energy entanglement features.

Findings

No universal low-energy entanglement features in neutron-deuteron, proton-deuteron, and deuteron-deuteron scattering.

Calculated entanglement powers for various scattering processes.

Coulomb interaction modifies entanglement in deuteron-involved scatterings.

Abstract

We investigate the spin entanglement in few-nucleon scattering processes involving nucleons and deuterons. For this purpose, we consider the entanglement power introduced by Beane et al. We analyze different entanglement entropies as a basis to define the entanglement power of the strong interaction and calculate the corresponding entanglement powers for proton-neutron, neutron-deuteron, proton-deuteron, and deuteron-deuteron scattering. For the latter two processes, we also take into account the modification from the Coulomb interaction. In contrast to proton-neutron scattering, no universal low-energy features are evident in the spin entanglement in neutron-deuteron, proton-deuteron, and deuteron-deuteron scattering.