Experimental realization of Dicke states of up to six qubits for multiparty quantum networking

TL;DR

This paper reports the first experimental creation of a six-photon Dicke state, demonstrating its properties, versatility, and potential applications in multiparty quantum networking protocols.

Contribution

It is the first to experimentally generate and characterize a six-photon Dicke state, showing its utility in quantum networking tasks.

Findings

Fidelity of 0.56 with ideal Dicke state

Violation of genuine six-qubit entanglement witness

Versatility in projecting to other entangled states

Abstract

We report the first experimental generation and characterization of a six-photon Dicke state. The produced state shows a fidelity of F=0.56+/-0.02 with respect to an ideal Dicke state and violates a witness detecting genuine six-qubit entanglement by four standard deviations. We confirm characteristic Dicke properties of our resource and demonstrate its versatility by projecting out four- and five-photon Dicke states, as well as four-photon GHZ and W states. We also show that Dicke states have interesting applications in multiparty quantum networking protocols such as open-destination teleportation, telecloning and quantum secret sharing.