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Quantum Information and Measurement (QIM)

Experimental Quantum Darwinism simulator using photonic cluster states

Mario Arnolfo Ciampini, Giorgia Pinna, Mauro Paternostro, Paolo Mataloni

Published Jan 1, 2019• 1 citation
Publisher

Abstract

We investigate the emergence of Quantum Darwinism in a photonic cluster as simulator of interactions between a quantum system and its environment. We demonstrate experimentally the effect of correlations in the emergence of objective reality.
DOI
10.1364/qim.2019.s2d.6

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Abstract Quantum Darwinism is a compelling theory that describes the quantum-to classical transition as the emergence of objectivity of quantum systems. Spectrum broadcast structure and strong quantum Darwinism are two extensions of this theory with emphasis on state structure and information respectively. The complete experimental verification of these three frameworks, however, requires quantum state tomography over both the system and accessible environments, thus limiting the feasibility and scalability of experimental tests. Here, we introduce a subspace-dependent objectivity operation and construct a witness that detects non-objectivity by comparing the dynamics of the system-environment state with and without the objectivity operation. We then propose a photonic experimental simulation that implements the witnessing scheme. Our work proposes a route to further experimental exploration of the quantum to classical transition.
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