Operational multipartite entanglement classes for symmetric photonic qubit states

TL;DR

This paper introduces experimental schemes to classify and analyze the entanglement of symmetric multiqubit photonic states, establishing a correspondence between experimental parameters and entanglement classes, with implications for quantum information processing.

Contribution

It provides novel experimental methods for classifying symmetric multiqubit photonic entanglement and links these classes to atomic entanglement schemes.

Findings

Schemes effectively classify symmetric entanglement classes

Established correspondence between parameters and entanglement classes

Compared efficiency of different classification schemes

Abstract

We present experimental schemes that allow to study the entanglement classes of all symmetric states in multiqubit photonic systems. In addition to comparing the presented schemes in efficiency, we will highlight the relation between the entanglement properties of symmetric Dicke states and a recently proposed entanglement scheme for atoms. In analogy to the latter, we obtain a one-to-one correspondence between well-defined sets of experimental parameters and multiqubit entanglement classes inside the symmetric subspace of the photonic system.