Experimental high fidelity six-photon entangled state for telecloning protocols

TL;DR

This paper reports the experimental generation and characterization of a high-fidelity six-photon entangled state suitable for quantum telecloning and secret sharing, achieved with a stable setup that avoids interferometric overlaps.

Contribution

It introduces a novel stable method to produce a six-photon entangled state without interferometric overlaps, advancing practical quantum communication protocols.

Findings

High-fidelity six-photon entangled state achieved

Stable setup without interferometric overlaps

Potential for quantum telecloning and secret sharing

Abstract

We experimentally generate and characterize a six-photon polarization entangled state, which is usually called "Psi 6 +". This is realized with a filtering procedure of triple emissions of entangled photon pairs from a single source, which does not use any interferometric overlaps. The setup is very stable and we observe the six-photon state with high fidelity. The observed state can be used for demonstrations of telecloning and secret sharing protocols.