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Photonic Entanglement and Polarization Nonclassicality: Two Manifestations, One Nature

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arxiv 2407.07477 v1 pith:VZMVTCRB submitted 2024-07-10 quant-ph

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keywords entanglementpolarizationnonclassicalnonclassicalityallowsanalyzeappearapplications
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We demonstrate in theory and experiment the strict equivalence between nonclassical polarization and the entanglement of indistinguishable photons, thereby unifying these two phenomena that appear dissimilar at first sight. This allows us to analyze nonclassicality and multi-photon entanglement within the same framework. We experimentally verify this double-sided form of quantumness and its independence from the polarization basis, contrasting other notions of coherence that are highly basis-dependent. Our findings show how nonclassical polarization turns out to be equally resourceful for quantum protocols as entanglement, emphasizing its importance in practical applications.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Quantum speedup from nonclassical polarization

    quant-ph 2026-03 conditional novelty 6.0 of 10

    For cross-Kerr interactions, the unrestricted quantum speed limit exceeds the speed limit of classical angular-momentum-coherent-state dynamics by a ratio that grows as √N, quantifying polarization nonclassicality as ...

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