Reliable multiphoton generation in waveguide QED

TL;DR

This paper proposes methods to generate high-fidelity, heralded multiphoton and entangled states using waveguide QED, advancing quantum information protocols with improved success rates.

Contribution

It introduces novel techniques leveraging waveguide QED for efficient multiphoton state generation with high success probability and fidelity.

Findings

High success probabilities demonstrated theoretically

Near-unity fidelity achievable with proposed methods

Potential for scalable quantum networks

Abstract

In spite of decades of effort, it has not yet been possible to create single-mode multiphoton states of light with high success probability and near unity fidelity. Complex quantum states of propagating optical photons would be an enabling resource for diverse protocols in quantum information science, including for interconnecting quantum nodes in quantum networks. Here, we propose several methods to generate heralded mutipartite entangled atomic and photonic states by using the strong and long-range dissipative couplings between atoms emerging in waveguide QED setups. Our theoretical analysis demonstrates high success probabilities and fidelities are possible exploiting waveguide QED properties.