{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Park J"],"funding":["Information Technology Research Center (ITRC)","Information Technology Research Center","National Research Foundation of Korea"],"pagination":["5456"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC8971477"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["12(1)"],"pubmed_abstract":["The phenomenon of Franson interference with time-energy entangled photon pairs beyond the single-photon coherence length observed upon nonlocal measurement at two space-like separated locations is of particular research interest. Herein, we determine the coherence length of temporally separated pairwise two-photon (TSPT) states of thermal photons emitted from a warm atomic ensemble in Franson-type interferometry, with the setup consisting of two spatially separated unbalanced Michelson interferometers beyond the coherence length of a thermal photon. Using a novel method of square-modulated thermal photons, we show that the sinusoidal Franson-type interference fringe of thermal photons is determined by the presence or absence of TSPT states (corresponding to the time delay between the long and short paths in Franson-type interferometry). We find that the indistinguishability of the TSPT state in the Franson-type interference is independent of the temporal separation of the thermal photons in the TSPT states."],"journal":["Scientific reports"],"pubmed_title":["Indistinguishability of temporally separated pairwise two-photon state of thermal photons in Franson-type interferometry."],"pmcid":["PMC8971477"],"funding_grant_id":["2021R1A2B5B03002377","IITP-2021-2020-0-01606"],"pubmed_authors":["Moon HS","Park J","Kim H"],"additional_accession":[]},"is_claimable":false,"name":"Indistinguishability of temporally separated pairwise two-photon state of thermal photons in Franson-type interferometry.","description":"The phenomenon of Franson interference with time-energy entangled photon pairs beyond the single-photon coherence length observed upon nonlocal measurement at two space-like separated locations is of particular research interest. Herein, we determine the coherence length of temporally separated pairwise two-photon (TSPT) states of thermal photons emitted from a warm atomic ensemble in Franson-type interferometry, with the setup consisting of two spatially separated unbalanced Michelson interferometers beyond the coherence length of a thermal photon. Using a novel method of square-modulated thermal photons, we show that the sinusoidal Franson-type interference fringe of thermal photons is determined by the presence or absence of TSPT states (corresponding to the time delay between the long and short paths in Franson-type interferometry). We find that the indistinguishability of the TSPT state in the Franson-type interference is independent of the temporal separation of the thermal photons in the TSPT states.","dates":{"release":"2022-01-01T00:00:00Z","publication":"2022 Mar","modification":"2025-04-19T12:55:26.597Z","creation":"2025-04-19T12:55:26.597Z"},"accession":"S-EPMC8971477","cross_references":{"pubmed":["35361833"],"doi":["10.1038/s41598-022-09516-y"]}}