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arXiv · 2105.05444

Anti-Hong-Ou-Mandel interference by coherent perfect absorption of entangled photons

Anton N. Vetlugin·Ruixiang Guo·Cesare Soci·Nikolay I. Zheludev
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Abstract

Two-photon interference, known as the Hong-Ou-Mandel effect, has colossal implications for quantum technology. It was observed in 1987 with two photodetectors monitoring outputs of the beamsplitter illuminated by photon pairs: the coincidence rate of the detectors drops to zero when detected photons overlap in time. More broadly, bosons (e.g., photons) coalesce while fermions (e.g., electrons) anti-coalesce when interfering on a lossless beamsplitter. Quantum interference of bosons and fermions can be tested in a single - photonics platform, where bosonic and fermionic states are artificially created as pairs of entangled photons with symmetric and anti-symmetric spatial wavefunctions. We observed that interference on a lossy beamsplitter, or a subwavelength coherent absorber reverses quantum interference in such a way that bosonic states anti-coalesce while fermionic states exhibit coalescent-like behavior. The ability to generate states of light with different statistics and manipulate their interference offers important opportunities for quantum information and metrology.

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Anton N. Vetlugin, Ruixiang Guo, Cesare Soci, Nikolay I. Zheludev. 2021-05-12. Anti-Hong-Ou-Mandel interference by coherent perfect absorption of entangled photons. https://doi.org/10.1088/1367-2630%2Fac9fe9

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