Impact of temporal correlations, coherence, and postselection on two-photon interference

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Author(s):	Cardoso, Fernando Redivo ; Lee, Jaewon ; Checchinato, Riccardo ; Littmann, Jan-Heinrich ; De Gregorio, Marco ; Hoefling, Sven ; Schneider, Christian ; Villas-Boas, Celso J. ; Predojevic, Ana Total Authors: 9
Document type:	Journal article
Source:	PHYSICAL REVIEW RESEARCH; v. 7, n. 1, p. 6-pg., 2025-02-21.
Abstract
Two-photon interference is an indispensable resource in quantum photonics, but it is not straightforward to achieve. The cascaded generation of photon pairs contains intrinsic temporal correlations that negatively affect the ability of such sources to perform two-photon interference, thus hindering applications. We report on how such correlation interplays with decoherence and temporal postselection, and under which conditions temporal postselection could improve two-photon interference visibility. Our study identifies crucial parameters and points the way to a source with optimal performance. (AU)

FAPESP's process:	22/00209-6 - Second generation quantum technologies
Grantee:	Celso Jorge Villas-Bôas
Support Opportunities:	Research Projects - Thematic Grants