We develop the analytical theory that describes simultaneous transmission of several photons through a waveguide coupled to a Λ-type atom. We show that after transmission of a short few-photon pulse, the final state of the atom and all the photons is a genuine multipartite entangled state belonging to the W class. The parameters of the input pulse are optimized to maximize the efficiency of three- and four-partite W-state production.
@article{arxiv.2309.13969,
title = {Many-photon scattering and entangling in a waveguide with a {\Lambda}-type atom},
author = {Denis Ilin and Alexander V. Poshakinskiy},
journal= {arXiv preprint arXiv:2309.13969},
year = {2023}
}