Protocols demonstrate increased flux of hyperentangled photons in Bell states using nonlinear detection.
Protocols employing polarization entangled photons are inherently slow, limited by the electronic bandwidth of photodetectors. We demonstrate generation and detection of an ultra-high flux of hyperentangled bi-photons in polarization Bell states using broadband nonlinear interferometry.
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Yaish et al. (2025) studied this question.
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