Many-photon scattering and entangling in a waveguide with a {\Lambda}-type atom

TL;DR

This paper develops an analytical theory for multi-photon scattering in a waveguide coupled to a Λ-type atom, demonstrating the generation of multipartite entangled states with optimized pulse parameters.

Contribution

It introduces a new analytical framework for understanding multi-photon transmission and entanglement generation in waveguide-atom systems, focusing on W-state production.

Findings

Multipartite entangled states are generated after multi-photon transmission.

Optimization of input pulse parameters enhances W-state production.

The theory applies to three- and four-partite entanglement scenarios.

Abstract

We develop the analytical theory that describes simultaneous transmission of several photons through a waveguide coupled to a $\Lambda$-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.