{"as_of":"2026-08-16T08:46:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:fc6eb532abb4b56f4639930848071dd86a619231e6a6f45ab3062123da43b7f9","coverage":[{"denominator":22,"lane":"reference_resolution","note":"Typed states for the displayed outbound observations.","records_observed":22,"source":"paper_references, paper_reference_links","source_observed_at":"2026-05-24T22:38:50.280814Z","state":"measured"},{"denominator":22,"lane":"standing_notices","note":"One-hop event checks from named stored sources.","records_observed":22,"source":"scholarly_work_events, retraction_status_cache","source_observed_at":"2026-08-16T06:30:59.297886+00:00","state":"measured"},{"denominator":0,"lane":"inbound_itemization","note":"Pith citing papers itemized under the disclosed page cap.","records_observed":0,"source":"paper_references, paper_reference_links","source_observed_at":null,"state":"measured"},{"denominator":1,"lane":"external_citation_measurements","note":"A source-named dated measurement, never combined with another source.","records_observed":0,"source":"cited_works","source_observed_at":null,"state":"measured"}],"external_citation_measurements":[],"inbound":[],"links":{"evidence":"/evidence","html":"/paper/1907.05641/citation-record","integrity":"/paper/1907.05641/integrity","json":"/paper/1907.05641/citation-record.json","paper":"/paper/1907.05641"},"outbound":[{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":null,"venue":null,"work_id":"4caaf719-14ac-4347-9670-50766df88acf","year":2044},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":1,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:1537f352643c67ab243e058141590e121264441847d931e0ba0c54b0d3fc4e4d","observation_id":"7a6f2454-bfb1-44b5-ab99-1c1204456f87","resolution":{"observed_at":"2026-05-24T22:40:02.812711Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":"Fano, Am","venue":null,"work_id":"0c105864-8bf1-445e-be35-482fc0028908","year":1961},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":2,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:4ae0e410705842678077477198685c4177b36f5f503483d0dd6ea836b5bd9ee5","observation_id":"3c4b20f7-35e9-4c13-8efc-15eba6cf604d","resolution":{"observed_at":"2026-05-24T22:40:02.850417Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":null,"venue":null,"work_id":"a3101569-0c25-48bc-8f51-736ac013e64f","year":1998},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":3,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:d1e3712e272dc020bc6fb4c700e1392790497ef74f0fa6569867a7b44a6c50f8","observation_id":"0f5dd044-d254-4114-a577-e575c17fd705","resolution":{"observed_at":"2026-05-24T22:40:02.847860Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":null,"venue":null,"work_id":"91389ae7-c1dc-4eec-880b-653ef4ee87ec","year":1912},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":4,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:bbe7dedaca96610ef9dc424ffdca0a1a9c8a2d93acb615ae494894608b6f64ea","observation_id":"16815c3b-f436-4be7-9a58-60404263c209","resolution":{"observed_at":"2026-05-24T22:40:02.861008Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":null,"venue":null,"work_id":"46a47527-1845-42e4-b7de-29a80b448554","year":1929},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":5,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:dd0e425826ff2e75767599fb01c9c555c623745d896b935899ef8ae40a952a08","observation_id":"0ba786ea-9622-4fa1-969b-77b953c56b7b","resolution":{"observed_at":"2026-05-24T22:40:02.844830Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":"Moshinsky, Phys","venue":null,"work_id":"e8b93e37-5f33-49ab-bc72-8a842158f254","year":1952},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":6,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:351817f1654744a3fc3ff919aa65820f0d89d735f9d9912637174e1a03d9ac75","observation_id":"15c8c6f8-e34f-477e-8c4a-0d5f6465468f","resolution":{"observed_at":"2026-05-24T22:40:02.863795Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":"Lounis, M","venue":null,"work_id":"9ce58600-78b2-4d31-ba32-1f35f89722f1","year":2005},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":7,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:3fe8d505632055836634d5859b7fed4cf9370f14040c2a47c8031d8342afa1f2","observation_id":"0f40f872-3d11-4989-ad97-b413b3f53fb2","resolution":{"observed_at":"2026-05-24T22:40:02.842121Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":"Czachor, Phys","venue":null,"work_id":"e29de9f6-3b96-4201-8222-ea748f4a7b01","year":2019},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":8,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:721222b8e39791f238f3979414ca55bdb92aac9b999b4150349e8cad4c66d758","observation_id":"07e32851-b53f-421a-b737-37fade7da58d","resolution":{"observed_at":"2026-05-24T22:40:02.866386Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":null,"venue":null,"work_id":"a695752c-7a46-42af-b84e-811e7ee78b17","year":2016},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":9,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:0ec70f8a07c7ab7985cd5d09d79265cd1440dea02c42de1bcbd429f6eb943e43","observation_id":"f98be14c-ae16-45eb-b126-df8ea8d4f06f","resolution":{"observed_at":"2026-05-24T22:40:02.839405Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":null,"venue":null,"work_id":"12753ff6-1b22-4a9a-b00d-8fa9076dccbc","year":1989},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":10,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:b9eafdfc5d10ab8095150a65ce44ecdeeedce6c8099c824e8a4b4f5904a7f893","observation_id":"4c8b0d2b-f9ab-4517-b5ff-2ed0c29b3eff","resolution":{"observed_at":"2026-05-24T22:40:02.836322Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":"Knill, R","venue":null,"work_id":"f3885cff-4cb0-4ae8-88c4-1f129ae4300d","year":2001},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":11,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:6d474389cbde1a3012aac2ce501e4a5b567121f2df12b5a658313208a8cd0e84","observation_id":"81d6718e-1eb7-4d15-8625-c1353b02a31e","resolution":{"observed_at":"2026-05-24T22:40:02.832928Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":"Legero, T","venue":null,"work_id":"2f59afec-023c-4f96-b093-13c8268cbefa","year":2003},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":12,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:864a9a9bbef17e54e2960ad7108f4ca77f541993fb1c78252184ab1108ea608a","observation_id":"331407fc-c189-42d7-b3c3-88142c13ef69","resolution":{"observed_at":"2026-05-24T22:40:02.852981Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"1711.00080","last_updated":"2017-10-31T19:55:24Z","snapshot_observed_at":"2026-08-15T21:30:23.528713Z","submitted_at":"2017-10-31T19:55:24Z","title":"Hong-Ou-Mandel Interference","version":1},"cited_work":{"arxiv_id":"1711.00080","doi":null,"metadata_source":"arxiv_reference","pith_arxiv_id":"1711.00080","snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":"DkpTy78h3o2ZA7szgOLTe/hPILQ=","venue":null,"work_id":"d3268149-093d-4478-9034-7b0b8d43ef63","year":1990},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":13,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"cited_paper":"/paper/1711.00080","citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:142a6d21eaacc355bba2be6f430d42f840b1b8c59ddd7456f58a775dff0719fb","observation_id":"2b92ba51-61cb-4f7a-b476-b2e76aeb9ab8","resolution":{"observed_at":"2026-05-24T22:40:01.972226Z","resolver_source":"arxiv_id","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":null,"venue":null,"work_id":"93251259-60e7-4261-b8fc-eccc72af00f2","year":1994},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":14,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:7dd1713f2982374f85f7bec60b3276ec12b1e7373c6de8e989d62a412ab11f54","observation_id":"0d63ff53-05e5-4b77-8553-9c0a2800f226","resolution":{"observed_at":"2026-05-24T22:40:02.829526Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":"Zhang, C","venue":null,"work_id":"c45922b8-6376-4235-aad4-b4fe7ad05f12","year":2006},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":15,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:a67860649fac32ec5ae72152674622be2e9897c0ca61479610869460f0e9a47c","observation_id":"af928ac4-98c7-49c9-ab38-993cb11a628c","resolution":{"observed_at":"2026-05-24T22:40:02.826778Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":null,"venue":null,"work_id":"b9e8dae6-d411-4c7c-ace7-cb8b416fadbf","year":2002},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":16,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:afe8d234662442430bd60f97c7230e7ed945bba089c3efa8b9e2f8e07ebcdbec","observation_id":"d07fe8a2-a1fc-408c-bc64-0b643a1d8e07","resolution":{"observed_at":"2026-05-24T22:40:02.858255Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":null,"venue":null,"work_id":"19c82fff-5224-4e19-b43f-6e1e79839cc0","year":1989},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":17,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:ec1ba76f755f521e763365b52b48519c93fa5e2498b60e98dc30746e2df026c0","observation_id":"3fb5d471-00bf-4092-a853-36dc618e928b","resolution":{"observed_at":"2026-05-24T22:40:02.823765Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":"Estes, Thomas H","venue":null,"work_id":"afa14581-40e6-4dba-a812-9fb01484dbdf","year":1968},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":18,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:d321eac663e6bc836ede03328d6c92163a09df91abc144c88e77aa4f70e8a8a6","observation_id":"aa75f225-4998-46db-ad55-60d6c4d9addc","resolution":{"observed_at":"2026-05-24T22:40:02.821097Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":"Janszky and A.V","venue":null,"work_id":"150c5b61-bd8f-4208-86b9-faf2ecc279f2","year":1990},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":19,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:b0c5b262fb4a3ae9d635a0a84a913334d2f0910a04cab82df8f09059dc297d1c","observation_id":"275697d4-3b55-42ec-bc34-5b5eec8297a3","resolution":{"observed_at":"2026-05-24T22:40:02.818155Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":null,"venue":null,"work_id":"40a2cb36-f896-4ee4-a6de-fddbc1be17cc","year":2018},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":20,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:437cba1880b788f0c1fa7e8be75bae8d03dd10ab2b91cdb13583f1799e4b5510","observation_id":"44d7f157-9565-4cc6-850f-d7f5abc65296","resolution":{"observed_at":"2026-05-24T22:40:02.855366Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"1811.06517","last_updated":"2020-10-22T19:59:25Z","snapshot_observed_at":"2026-08-14T17:58:11.643881Z","submitted_at":"2018-11-15T18:24:33Z","title":"Limitations on the use of the Heisenberg picture in quantum optics","version":3},"cited_work":{"arxiv_id":"1811.06517","doi":null,"metadata_source":"arxiv_reference","pith_arxiv_id":"1811.06517","snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":"Franson and R.A","venue":null,"work_id":"53527a54-28cc-4cdf-944b-078d3bde8171","year":2018},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":21,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"cited_paper":"/paper/1811.06517","citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:f59a850db47cb17354faf0383bc186621ea317ba6f076d7f5087181132f936a1","observation_id":"a55b348b-dc61-4e17-9387-686353bc19ac","resolution":{"observed_at":"2026-05-24T22:40:01.967051Z","resolver_source":"arxiv_id","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":null,"venue":null,"work_id":"2c459e5c-f01c-4595-a3ce-09386d75cc96","year":1998},"citing_paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats","version":1},"reference_index":22,"source":"pdf_text","source_observed_at":"2026-05-24T22:38:50.280814Z"},"links":{"citing_paper":"/paper/1907.05641"},"observation_digest":"sha256:7e8396a8aff05cb5fd4c6c86f5f8114dde7e032e3610ac3b0590803a68e8dfcd","observation_id":"4b95b241-4b94-4d17-b9c1-d10523d53e3f","resolution":{"observed_at":"2026-05-24T22:40:02.815600Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-16T06:30:59.297886+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"state":"measured"}}],"paper":{"arxiv_id":"1907.05641","last_updated":"2019-07-12T09:26:24Z","latest_version":1,"primary_category":"quant-ph","snapshot_observed_at":"2026-07-06T08:07:17.984952Z","submitted_at":"2019-07-12T09:26:24Z","title":"Perpetual generation of two-photon quantum beats"},"reference_resolution":{"displayed":22,"state_counts":{"malformed_identifier":0,"metadata_mismatch":0,"parse_uncertain":0,"unresolved":11,"verified_exact":2,"verified_fuzzy":9},"total_outbound_references":22},"refusal":"A citation records a reference. It does not transfer a finding from one paper to another.","schema":"pith.paper-citation-record.v1","standing_sources":[{"observed_at":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"thesis":"As of 16 August 2026, this Paper Citation Record lists 22 of 22 outbound references and 0 inbound Pith citation observations for arXiv:1907.05641."}