Entangling neutrons via successive scattering from a substrate

TL;DR

This paper proposes a method to entangle two neutrons through successive scattering from a substrate, demonstrating that magnetic field tuning can maintain entanglement regardless of sample size.

Contribution

It introduces a novel scheme for neutron entanglement that is effective even with large samples by applying a magnetic field and adjusting neutron momentum.

Findings

Entanglement decreases with sample size in zero magnetic field.

Applying a magnetic field and tuning neutron momentum sustains entanglement.

Substantial entanglement achievable regardless of substrate size.

Abstract

This letter details a simple scheme to entangle two neutrons by successive scattering from a macroscopic sample. In zero magnetic field the entanglement falls as the sample size increases. However, by applying a field and tuning the momentum of the neutrons, one can achieve a substantial degree of entanglement irrespective of the size of the sample.