Experimental characterization of a non-local convertor for quantum photonic networks

TL;DR

This paper experimentally demonstrates a quantum photonic gate capable of converting multiqubit entangled states, such as cluster, GHZ, and Dicke states, which is crucial for flexible quantum networks and resource generation.

Contribution

It introduces and experimentally validates a non-local quantum convertor that transforms multiqubit entangled states using only a two-qubit operation, enhancing quantum network re-wiring capabilities.

Findings

Successfully converted a four-qubit cluster state into GHZ and Dicke states

High fidelity results indicate the gate's potential for flexible quantum network applications

Demonstrated the gate's ability to generate entanglement and discord resources

Abstract

We experimentally characterize a quantum photonic gate that is capable of converting multiqubit entangled states while acting only on two qubits. It is an important tool in large quantum networks, where it can be used for re-wiring of multipartite entangled states or for generating various entangled states required for specific tasks. The gate can be also used to generate quantum information processing resources, such as entanglement and discord. In our experimental demonstration, we converted a linear four-qubit cluster state into different entangled states, including GHZ and Dicke states. The high quality of the experimental results show that the gate has the potential of being a flexible component in distributed quantum photonic networks.