{"as_of":"2026-08-04T09:07:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:01687ce481a23099c5d2f53eef51b35f145fad7fc9b9c875ede76a7b78433363","coverage":[{"denominator":39,"lane":"reference_resolution","note":"Typed states for the displayed outbound observations.","records_observed":39,"source":"paper_references, paper_reference_links","source_observed_at":"2026-05-24T16:06:06.010375Z","state":"measured"},{"denominator":40,"lane":"standing_notices","note":"One-hop event checks from named stored sources.","records_observed":40,"source":"scholarly_work_events, retraction_status_cache","source_observed_at":"2026-08-04T06:34:03.388597+00:00","state":"measured"},{"denominator":1,"lane":"inbound_itemization","note":"Pith citing papers itemized under the disclosed page cap.","records_observed":1,"source":"paper_references, paper_reference_links","source_observed_at":"2026-05-24T16:06:06.010375Z","state":"measured"},{"denominator":1,"lane":"external_citation_measurements","note":"A source-named dated measurement, never combined with another source.","records_observed":0,"source":"pith","source_observed_at":"2026-05-24T16:06:15.301858Z","state":"measured"}],"external_citation_measurements":[],"inbound":[{"citation":{"cited_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"cited_work":{"arxiv_id":"1907.11399","doi":null,"metadata_source":"pith","pith_arxiv_id":"1907.11399","snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","venue":"quant-ph","work_id":"e5041d93-d707-486d-98d7-8f6ea8939e78","year":2019},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":11,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"cited_paper":"/paper/1907.11399","citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:25b8827e4a060569c25aa0193fb3753ca753f98aca25dccdd436f8d4aad7bb7d","observation_id":"b5ce4bb9-e848-4a27-aeee-1fd84597d7b3","resolution":{"observed_at":"2026-05-24T16:06:15.305275Z","resolver_source":"local_arxiv","status":"metadata_mismatch"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+00:00","source":"retraction_watch"}],"state":"measured"}}],"links":{"evidence":"/evidence","html":"/paper/1907.11399/citation-record","integrity":"/paper/1907.11399/integrity","json":"/paper/1907.11399/citation-record.json","paper":"/paper/1907.11399"},"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":"Coherent transfer of an optical carrier over 251km","venue":null,"work_id":"096e88ba-db0f-40f7-a777-0fab97432387","year":2007},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":1,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:6f66122c233e10053c1797fa254334fa3f4324bddf4aab6a27c1c6206abbbd9a","observation_id":"e59f06be-e711-4f34-ad90-ad0d0823e717","resolution":{"observed_at":"2026-05-24T16:06:15.597331Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Remote transfer of ultrastable frequency references via ﬁber networks","venue":null,"work_id":"035249e8-3728-4f55-b42c-85f26cee816f","year":2007},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":2,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:42491ec9a04b0c35ed37f4e5edab5963d6b9350a67741f9fab22283fd2f90494","observation_id":"36f7b921-ffed-4079-975b-4d4efa7005ef","resolution":{"observed_at":"2026-05-24T16:06:15.707941Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Systematic evaluation of an atomic clock at2× 10−18 total uncertainty","venue":null,"work_id":"13fcf407-af45-4b56-9696-6b156329d2b4","year":2015},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":3,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:2a13317896c628c4d630044e784d09e276d11e8123a0f6ad50f58895f6b829b8","observation_id":"38187ff8-f3d3-42e4-b220-07c36ea5534b","resolution":{"observed_at":"2026-05-24T16:06:15.619745Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Single-IonAtomicClockwith 3× 10−18 Systematic Uncertainty","venue":null,"work_id":"cadc9a67-ad25-46ac-8bac-15e231784e82","year":2016},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":4,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:45a8266c9fd3dda7761ec13d576c2416696876ee97bf5ea36ba231416cac9d86","observation_id":"7ca7c5f0-bb5a-4acf-ab35-5f9c230d39ce","resolution":{"observed_at":"2026-05-24T16:06:15.648096Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Cryogenic optical lattice clocks","venue":null,"work_id":"77dab5fe-0885-4e23-8647-cd5b93eb53b8","year":2015},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":5,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:036b584c0c8ed5061672539fea72bdceef845a83514adbf1c0223a67160c51ad","observation_id":"6d420703-58bb-452c-898f-8300ffecc8c9","resolution":{"observed_at":"2026-05-24T16:06:15.562899Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Ultra-stable optical clock with two cold-atom ensembles","venue":null,"work_id":"2e63cb0d-ea81-4bed-bedf-6e72ef870847","year":2017},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":6,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:9eb83ae02be3b1cf6721e4a1d63cc0d268fb5839ce13d8ddc2e1d7c14e8a0a05","observation_id":"e6ffba4d-66ec-4d43-8ddb-37588abc1d6e","resolution":{"observed_at":"2026-05-24T16:06:15.604583Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"A strontium lattice clock with3× 10−17 inaccuracy and its frequency","venue":null,"work_id":"0bce5c68-e324-4874-9b00-d0d9a98ca364","year":2014},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":7,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:c5d4b4eebca319d7a163670114693acbc69853bdee7e4ad78bab709dc1d683ae","observation_id":"cd1480ac-881c-4384-9045-0e27b8851eb1","resolution":{"observed_at":"2026-05-24T16:06:15.613113Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Frequency ratio of Yb and Sr clocks with5× 10−17 uncertainty at 150 seconds averaging time","venue":null,"work_id":"70d71cf0-936d-4065-a541-3e73a8dbeb49","year":2016},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":8,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:0fa7786f92157c56f6c4ad9780e26e1b26195da4a4aed44c694611572ccf8474","observation_id":"10a58675-c4df-409d-8ff6-c76a34c6d87e","resolution":{"observed_at":"2026-05-24T16:06:15.596772Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Towards a redeﬁnition of the second based on optical atomic clocks","venue":null,"work_id":"502a2453-af70-402c-a801-2fdf0f061882","year":2015},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":9,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:3ddfa3432b299796f4abc630fd647fb64cbff5e404c4808a4c3dac3a093f8c82","observation_id":"3ee02ddd-4271-43be-9159-958384cb3ca1","resolution":{"observed_at":"2026-05-24T16:06:15.698904Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Brillouin ampliﬁcation supports1× 10−20 accuracy in optical frequency transfer over 1400 km of underground ﬁbres","venue":null,"work_id":"47e691b1-6812-4956-a23c-99282171ae3c","year":2015},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":10,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:d7a602f77cb97c41c475016be7bf91b301bb69745ae31b25ee34a9c8116c2c05","observation_id":"41182723-b587-4c72-9da2-0caf8c8a5f00","resolution":{"observed_at":"2026-05-24T16:06:15.589268Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"cited_work":{"arxiv_id":"1907.11399","doi":null,"metadata_source":"pith","pith_arxiv_id":"1907.11399","snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","venue":"quant-ph","work_id":"e5041d93-d707-486d-98d7-8f6ea8939e78","year":2019},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":11,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"cited_paper":"/paper/1907.11399","citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:25b8827e4a060569c25aa0193fb3753ca753f98aca25dccdd436f8d4aad7bb7d","observation_id":"b5ce4bb9-e848-4a27-aeee-1fd84597d7b3","resolution":{"observed_at":"2026-05-24T16:06:15.305275Z","resolver_source":"local_arxiv","status":"metadata_mismatch"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Optical- Frequency Transfer over a Single-Span 1840 km Fiber Link","venue":null,"work_id":"9d98ed31-363d-43ac-8fe3-813560d58648","year":2013},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":12,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:edb553a2a80102c5c44fd92692d39f54e1eea128e6375cbd740af07f38c58383","observation_id":"9f0df01c-d560-4e05-8085-5873afcd6f49","resolution":{"observed_at":"2026-05-24T16:06:15.685185Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Delivering the same optical frequency at two places: accurate cancellation of phase noise introduced by an optical ﬁber or other time-varying path","venue":null,"work_id":"436449ca-f85b-40ae-91cb-f5df86a11819","year":1994},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":13,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:a16b5bcccc23886da32dad502b5be5ba71e1270b886b0f8548ed3241dd9f232f","observation_id":"88242588-984f-41b2-8b75-6532b1cc5bd9","resolution":{"observed_at":"2026-05-24T16:06:15.693546Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Frequency transfer via a two-way optical phase comparison on a multiplexed ﬁber network","venue":null,"work_id":"a34157b2-4d62-4112-8c8c-fece73bbd3d4","year":2014},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":14,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:6bdf2e18bbec1a36226409aa62febe3282491cee674c7a22c766ca79e252d5c2","observation_id":"35c7c7cd-665c-4cbc-ad02-78aa267c274b","resolution":{"observed_at":"2026-05-24T16:06:15.566715Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Cascaded multiplexed optical link on a telecommunication network for frequency dissemination","venue":null,"work_id":"06ef9c02-b3f9-4353-9848-bb964b074391","year":2010},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":15,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:415562ae6f6a7bd6a63902f672004c0fee202a30588d0793f309d8eb1a6fe40f","observation_id":"6e4c8196-1f1a-4e8a-8eba-6b8df768c418","resolution":{"observed_at":"2026-05-24T16:06:15.673276Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Two-way optical frequency comparison over 100 km telecommunication network ﬁbers","venue":null,"work_id":"38cebfbc-3093-4028-b902-743f5c4bdee2","year":2014},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":16,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:d8b0ad957167c5f4033f74e9a53316136b1a53305bba31f2f1373bc58b8749c9","observation_id":"b2dbab02-a3d7-49d7-a844-83ee51c04b07","resolution":{"observed_at":"2026-05-24T16:06:15.631552Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Tackling the limits of optical ﬁber links","venue":null,"work_id":"f04ce57e-7f05-443b-a4c9-c31ff98d0171","year":2015},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":17,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:2af939c29047ee99d9f77cf9c28458fb6bff314dc56a898aaa392edecdb7f38b","observation_id":"22e6efcb-1dac-4da9-9acf-d2be50d44e17","resolution":{"observed_at":"2026-05-24T16:06:15.623284Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Hybrid ﬁber link for accurate optical frequency comparisons","venue":null,"work_id":"d5118ff3-d18d-4f9c-88db-44a8c2b268ae","year":2017},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":18,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:32d4213563e22c7495a70398ada151fc1778a1a5eaec46582c30a1642dcf0938","observation_id":"c8a89ab0-6291-4361-9b01-e6237474231c","resolution":{"observed_at":"2026-05-24T16:06:15.645834Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"1705.04089","last_updated":"2017-05-11T09:40:46Z","snapshot_observed_at":"2026-07-06T05:42:13.091749Z","submitted_at":"2017-05-11T09:40:46Z","title":"Geodesy and metrology with a transportable optical clock","version":1},"cited_work":{"arxiv_id":"1705.04089","doi":null,"metadata_source":"pith","pith_arxiv_id":"1705.04089","snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":"Geodesy and metrology with a transportable optical clock","venue":"physics.atom-ph","work_id":"7b146122-b593-4040-931a-e64c049e7d65","year":2017},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":19,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"cited_paper":"/paper/1705.04089","citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:795d343c3a8ff125f3e72eb243acf177ea5040b0b25673ebc0e3944f181eed40","observation_id":"6e511c58-ebf5-425f-9aa7-788454b13a8a","resolution":{"observed_at":"2026-05-24T16:06:15.298537Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Eﬀect of a timebase mismatch in two-way optical frequency transfer","venue":null,"work_id":"05be9f9c-b99b-497b-a3eb-a7a9792ea859","year":2017},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":20,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:584ff3cdc02fc1c7f67cec80229892664579e9d7a7e3aa686969fc260b900b4c","observation_id":"119ee624-8ae5-4dcb-a849-d71be4426df6","resolution":{"observed_at":"2026-05-24T16:06:15.617917Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Test of special relativity using a ﬁber network of optical clocks","venue":null,"work_id":"e92b8155-10b6-4985-8814-8e113ae332c2","year":2017},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":21,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:bf4f0af9d7c057d21860f7e8c8700edc95cf6b6d3557ff74353dedfc9ad52e26","observation_id":"2571a2d2-1df9-4261-bded-6c54453d9990","resolution":{"observed_at":"2026-05-24T16:06:15.677274Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Quantum cascade laser frequency stabilization at the sub-Hz level","venue":null,"work_id":"c3af1fef-4639-427d-84ca-c977a878faf9","year":2015},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":22,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:9e50d269b29147590dc669aee61740247d83b884dd7c26ffde6b05fa2e4feaa8","observation_id":"bfb2bf96-75d7-4edc-bd45-af4a0f19bbeb","resolution":{"observed_at":"2026-05-24T16:06:15.616535Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"High-stabilitytransferofanopticalfrequencyoverlongﬁber-optic links","venue":null,"work_id":"ac4dbd64-b8a1-4db5-a09b-7c53818bbf3e","year":2008},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":23,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:08cb90173cfdfd6ef22117661783442e02891018148fc92e60491cbbed0ac6bc","observation_id":"18e4d1de-7050-43d5-a03f-ef07706946aa","resolution":{"observed_at":"2026-05-24T16:06:15.680974Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Time and frequency transfer in modern DWDM telecommunication networks","venue":null,"work_id":"69b1c72f-4cf3-4702-bf21-292ffee99b10","year":2017},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":24,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:9929b3efa25eec6fa0b95d7c7e78512f580170ca13e1dee9772eb6f617fa17c7","observation_id":"8cf41d5f-ecc6-431f-8136-ee97c2f2ac7b","resolution":{"observed_at":"2026-05-24T16:06:15.669447Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Considerations on the measurement of the stability of oscillators with frequency counters","venue":null,"work_id":"5d58bdbb-99b3-495a-b8ec-5fa46be4318d","year":2007},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":25,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:f03764dc3c4eb69f742eff27d1f2fb7bf6ffdf88388cad6fe1b47a3a1f1150bc","observation_id":"6a7678b0-c541-44bf-8a01-cf2291698db4","resolution":{"observed_at":"2026-05-24T16:06:15.703007Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"The uncertainty associated with the weighted mean frequency of a phase-stabilized signal with white phase noise","venue":null,"work_id":"6dd15577-d11d-43dc-836b-7e38331b7099","year":2010},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":26,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:ff2ebcc10c33cd228eca9a2819e684925076ca0ed7e30f722622d406beb08cc6","observation_id":"0cee0a7e-bb46-4cf5-b885-02203ae62ef6","resolution":{"observed_at":"2026-05-24T16:06:15.659008Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"On the relation between uncertainties of weighted frequency averages and the various types of Allan deviations","venue":null,"work_id":"74556a5e-ba9a-4726-b4ee-01caa992f2ad","year":2015},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":27,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:c71b3527c382dbbc194840966b241e7bbf07ab1bb630d9c90b70110f0c6ccd1a","observation_id":"c74e2bc2-daec-4bdf-9f92-e597b114c140","resolution":{"observed_at":"2026-05-24T16:06:15.581290Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"An Eﬃcient and Conﬁgurable Preprocessing Algorithm to Improve Stability Analysis","venue":null,"work_id":"9ebd4c5c-ffc0-4ac0-9680-9049bc82a8ac","year":2016},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":28,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:76bf729eb162023fab8c3d3085eab2ec8a5629412253dc56963f0112a1355bad","observation_id":"42fce967-8558-43ab-82ed-1f0b53100029","resolution":{"observed_at":"2026-05-24T16:06:15.600376Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"GPS Time and Frequency Transfer: PPP and Phase-Only Analysis","venue":null,"work_id":"93b55643-c15f-4d74-a72e-ec8128580abe","year":2008},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":29,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:3bc9875372da1ec53b29ab979a01fb2d5969ef1afa3ee9346385a0d26bffb9af","observation_id":"a208e37d-de6e-4dbf-9898-313df6c969ec","resolution":{"observed_at":"2026-05-24T16:06:15.622213Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Optical frequency transfer via a 660 km underground ﬁber link using a remote Brillouin ampliﬁer","venue":null,"work_id":"2865dbd1-010e-4f82-91cd-2946ebc77a22","year":2014},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":30,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:adfa95603bcb78ad8004232d318a2483b0d38f951a94a6913cd5a23be1596158","observation_id":"2e9fa916-5539-4dc8-b76f-7cf48e72f2b5","resolution":{"observed_at":"2026-05-24T16:06:15.660848Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Optical frequency transfer - a European network","venue":null,"work_id":"85445346-d6af-4a64-8a61-e49ecaa8bf3b","year":null},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":31,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:0f0d3f4238873cc05c0bf343d07543fc1406b1e0c893560bfcdcc0b3eb17df1c","observation_id":"d05b5118-b877-462f-b53f-4b2be533769f","resolution":{"observed_at":"2026-05-24T16:06:15.636599Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"classical","venue":null,"work_id":"7f2160a5-d720-45d6-9a29-7829d7b58d3a","year":null},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":32,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:7b17805183d6efddf661062cde5b42347e846cdad3578d865d1a306d601b2557","observation_id":"be17572c-408e-4265-9348-ce046c5a7e3e","resolution":{"observed_at":"2026-05-24T16:06:15.593178Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"The two ﬁbers, denoted by F1 and F2, are a pair of urban ﬁbers of 43 km connecting two laboratories, SYRTE and LPL","venue":null,"work_id":"fcd312a2-b7f1-498c-86ec-eaddaa3bad91","year":null},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":33,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:ab4e70ea2e63782861db68d6119eb9f15173beaec2c5db4f8a59d9a84daddf96","observation_id":"0316868c-43cd-4519-9079-d0a5fb05409f","resolution":{"observed_at":"2026-05-24T16:06:15.665472Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"On PD1, one records the beat note between the laser beam reﬂected by FM labeled A and by p-FM labeled D, shown in Fig.1 as green ﬁlled circles","venue":null,"work_id":"badb9607-5378-4040-93b5-418ad4cce792","year":null},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":34,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:0b9e76e30b93ca43a522f3ec188d61328edd71ad7e37c2214bf612ff3bf479a6","observation_id":"db2fb500-b40d-4b7e-b959-419cd48e71f5","resolution":{"observed_at":"2026-05-24T16:06:15.652449Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"096e37b5-db46-405f-9e0c-a5057e8df50a","year":null},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":35,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:e4a88f53ebfa545772579399695cef86ec52f2cd119cd78f2f33b05714b20c84","observation_id":"8d621d31-e480-4422-92ec-c4f4d7143aa5","resolution":{"observed_at":"2026-05-24T16:06:15.689543Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Phase evolution and Fourier analysis InordertoprovideabetterinsightofthediﬀerencesbetweentheseTWBsandTWNFobservables, we present their phase evolution in Fig.4(a)","venue":null,"work_id":"51f31bba-5659-48fc-af5a-1ab80f64b112","year":null},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":36,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:3ea979a1bdb02bb7cd79be3bc743eb7f6a736b36e637351eecf59361e826ba15","observation_id":"1ed0c15e-8e78-4090-871a-c49d96967c63","resolution":{"observed_at":"2026-05-24T16:06:15.635598Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"d0a7aa51-cc3f-4480-85ea-a9c0c25dae84","year":null},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":37,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:d162b3fd34c0637cb8e04545e1d90247438045563258f582fd6c066657e6a61f","observation_id":"a9b46d90-fd79-4b18-8dab-dbceaa729201","resolution":{"observed_at":"2026-05-24T16:06:15.580934Z","resolver_source":"raw_fallback","status":"malformed_identifier"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"Accuracy and reciprocity We evaluate the accuracy of the frequency comparison of the hybrid setup","venue":null,"work_id":"28a21f40-898c-4968-8716-16a321a3bbfd","year":null},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":38,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:7c05ba66181a14647b221129cc00818f1660693600c88a488d2cfa7399b74534","observation_id":"32b462da-b9c0-4785-ad9f-296d1df8c1c0","resolution":{"observed_at":"2026-05-24T16:06:15.644188Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+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":"optical ﬁber links chain","venue":null,"work_id":"e91de8eb-1ab5-4b0c-ac7d-643e1b4d8f39","year":null},"citing_paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level","version":1},"reference_index":39,"source":"pdf_text","source_observed_at":"2026-05-24T16:06:06.010375Z"},"links":{"citing_paper":"/paper/1907.11399"},"observation_digest":"sha256:94b18b0a69a9023b09f641caeb2a2f1c3c6ddbe55b081474fb6267dab3cf460a","observation_id":"a97e6f9e-13fa-4edf-879f-168296ee3d5e","resolution":{"observed_at":"2026-05-24T16:06:15.662972Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-04T06:34:03.388597+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+00:00","source":"retraction_watch"}],"state":"measured"}}],"paper":{"arxiv_id":"1907.11399","last_updated":"2019-07-26T06:59:31Z","latest_version":1,"primary_category":"quant-ph","snapshot_observed_at":"2026-08-01T01:36:01.331481Z","submitted_at":"2019-07-26T06:59:31Z","title":"Studying fundamental limit of optical fiber links to $10^{-21}$ level"},"reference_resolution":{"displayed":39,"state_counts":{"malformed_identifier":1,"metadata_mismatch":1,"parse_uncertain":0,"unresolved":1,"verified_exact":1,"verified_fuzzy":35},"total_outbound_references":39},"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":"2026-08-04T06:34:03.388597+00:00","source":"crossref"},{"observed_at":"2026-08-04T06:33:57.428241+00:00","source":"retraction_watch"}],"thesis":"As of 4 August 2026, this Paper Citation Record lists 39 of 39 outbound references and 1 inbound Pith citation observation for arXiv:1907.11399."}