Efficient Dicke state generation in a network of lossy channels

TL;DR

This paper presents a protocol for efficient generation of Dicke and W states in a multipartite optical network, demonstrating improved rate-loss scaling and providing theoretical and experimental analyses.

Contribution

It generalizes the twin-field strategy to multipartite networks and analyzes its performance with both ideal and Gaussian resource states.

Findings

Advantageous rate-loss scaling for distributing W and Dicke states.

Theoretical formulas and quantitative performance analysis provided.

Analysis includes both ideal and Gaussian resource states.

Abstract

We analyze the generation of entanglement in a multipartite optical network. We generalize the twin-field strategy to the multipartie case and show that our protocol has advantageous rate-loss scalings of distributing W states and Dicke states over the star networks. We give precise theoretical formulas and quantitative performance analyses. Also analysis of the same protocol using Gaussian states as resources, which is a typical setup of many experimental tests, is provided.