A non-local Hong-Ou-Mandel effect is realized via post-selection on separated outputs in a four-path interferometer, demonstrating two-photon interference without photons sharing a local beam splitter.
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The non-local Hong-Ou-Mandel effect
A non-local Hong-Ou-Mandel effect is realized via post-selection on separated outputs in a four-path interferometer, demonstrating two-photon interference without photons sharing a local beam splitter.