Experimental signature of Quantum Darwinism in photonic cluster states

TL;DR

This paper experimentally investigates Quantum Darwinism using photonic graph states, revealing how multipartite entanglement and environment-to-system interactions influence the emergence of objective reality in quantum systems.

Contribution

It provides one of the first experimental characterizations of Quantum Darwinism with photonic hyperentangled states, highlighting the role of multipartite entanglement and back-action effects.

Findings

Multipartite entanglement affects Quantum Darwinism features

Environment-to-system back-action influences objective reality

Experimental evidence of Quantum Darwinism in photonic systems

Abstract

We report on an experimental assessment of the emergence of Quantum Darwinism (QD) from engineered open-system dynamics. We use a photonic hyperentangled source of graph states to address the effects that correlations among the elements of a multi-party environment have on the establishment of objective reality ensuing the quantum-to-classical transition. Besides embodying one of the first experimental efforts towards the characterization of QD, our work illustrates the non-trivial consequences that multipartite entanglement and, in turn, the possibility of having environment-to-system back-action have on the features of the QD framework.