Abstract
The heralding technique has been widely deployed as a statistical approach to approximate deterministic single-photon states from the spontaneous parametric down-conversion (SPDC) process. As necessary for the two-photon Hong-Ou-Mandel (HOM) effect, the single frequency mode preparation of heralded single-photon states – which can be achieved by removing frequency correlations – introduces thermal characteristics to the heralded state, whose impact on the HOM visibility has not been explicitly studied so far.
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