We propose a protocol that transfers entanglement from an entangled atomic two-level-system (TLS) resource to a pair of free electrons in an energy-sideband ladder via local electron-TLS interactions. In a controlled rotating-wave regime, closed-form reduced states are derived. TLS heralding then prepares a maximally entangled electron state in a two-dimensional single-excitation manifold, with a simple dependence on the initial TLS resource entanglement. Numerical integration of the full bilinear Hamiltonian quantifies the impacts of detuning and pulse shaping and identifies the leading beyond-rotating-wave corrections. The results establish a heralded route to entangled free electrons and will facilitate further advances in quantum electron optics.
@article{arxiv.2604.22974,
title = {Heralded Entanglement Transfer from Entangled Atomic Pair to Free Electrons},
author = {Du Ran and Reuven Ianconescu and Shuai Liu and Ya-dong Li and Ji-Yuan Bai and Ze-Long He and Zhi-Cheng Shi and Yan Xia and Avraham Gover},
journal= {arXiv preprint arXiv:2604.22974},
year = {2026}
}