Even by shining classical light on a single opening, one can perform a double-slit experiment and discover a surprising variety of quantum mechanical multi-photon correlations — thanks to surface plasmon polaritons and photon-number-resolving detectors.
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Wubs, M. Multiphoton quantum statistics from scattered classical light. Nat. Phys. 20, 689–690 (2024). https://doi.org/10.1038/s41567-024-02447-7
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DOI: https://doi.org/10.1038/s41567-024-02447-7
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