{"as_of":"2026-08-11T09:08:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:79f11cd1fc9dbe68188a18b1a111e22ecc7ce13cea031714e3359e6033f07429","coverage":[{"denominator":0,"lane":"reference_resolution","note":"Typed states for the displayed outbound observations.","records_observed":0,"source":"paper_references, paper_reference_links","source_observed_at":null,"state":"measured"},{"denominator":2,"lane":"standing_notices","note":"One-hop event checks from named stored sources.","records_observed":2,"source":"scholarly_work_events, retraction_status_cache","source_observed_at":"2026-08-11T06:34:44.6726+00:00","state":"measured"},{"denominator":2,"lane":"inbound_itemization","note":"Pith citing papers itemized under the disclosed page cap.","records_observed":2,"source":"paper_references, paper_reference_links","source_observed_at":"2026-08-02T14:10:16.036277Z","state":"measured"},{"denominator":1,"lane":"external_citation_measurements","note":"A source-named dated measurement, never combined with another source.","records_observed":0,"source":"arxiv_reference","source_observed_at":"2026-06-30T20:25:02.434407Z","state":"measured"}],"external_citation_measurements":[],"inbound":[{"citation":{"cited_paper":{"arxiv_id":"1907.07780","last_updated":"2019-07-19T15:47:38Z","snapshot_observed_at":"2026-08-05T14:30:03.776012Z","submitted_at":"2019-07-17T21:29:58Z","title":"Persistent atomic frequency comb based on Zeeman sub-levels of an erbium-doped crystal waveguide","version":2},"cited_work":{"arxiv_id":"1907.07780","doi":null,"metadata_source":"arxiv_reference","pith_arxiv_id":"1907.07780","snapshot_observed_at":"2026-06-30T20:25:02.434407Z","title":null,"venue":null,"work_id":"552ecb63-4620-4260-949e-72f2fcb1cec1","year":2020},"citing_paper":{"arxiv_id":"2605.14777","last_updated":"2026-07-15T14:00:31Z","snapshot_observed_at":"2026-08-03T02:02:46.001975Z","submitted_at":"2026-05-14T12:42:54Z","title":"Programmable cavity-enhanced telecom quantum memory in thin-film lithium niobate","version":1},"reference_index":39,"source":"pdf_text","source_observed_at":"2026-06-30T20:23:25.436347Z"},"links":{"cited_paper":"/paper/1907.07780","citing_paper":"/paper/2605.14777"},"observation_digest":"sha256:673dc260de048ed7df6007c994b1682d5ff82484507676919d74e9a30bd9821b","observation_id":"dd483f90-600b-4966-8cff-75c8fd3c392c","resolution":{"observed_at":"2026-06-30T20:25:02.435784Z","resolver_source":"arxiv_id","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-11T06:34:44.6726+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-11T06:34:44.6726+00:00","source":"crossref"},{"observed_at":"2026-08-11T06:34:36.301508+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"1907.07780","last_updated":"2019-07-19T15:47:38Z","snapshot_observed_at":"2026-08-05T14:30:03.776012Z","submitted_at":"2019-07-17T21:29:58Z","title":"Persistent atomic frequency comb based on Zeeman sub-levels of an erbium-doped crystal waveguide","version":2},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"1907.07780","snapshot_observed_at":"2026-08-02T14:10:16.036277Z","title":null,"venue":null,"work_id":null,"year":2020},"citing_paper":{"arxiv_id":"2605.14777","last_updated":"2026-07-15T14:00:31Z","snapshot_observed_at":"2026-08-03T02:02:46.001975Z","submitted_at":"2026-05-14T12:42:54Z","title":"Programmable cavity-enhanced telecom quantum memory in thin-film lithium niobate","version":2},"reference_index":39,"source":"pdf_text","source_observed_at":"2026-08-02T14:10:16.036277Z"},"links":{"cited_paper":"/paper/1907.07780","citing_paper":"/paper/2605.14777"},"observation_digest":"sha256:802b9fd9ba37dab8bc02b0d5e4e7aec44cd59513be4cf06bd455b4b8ee01494b","observation_id":"45fb3c4b-da2c-4276-b12a-d322e0baa2b2","resolution":{"observed_at":"2026-08-02T14:10:16.036277Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}}],"links":{"evidence":"/evidence","html":"/paper/1907.07780/citation-record","integrity":"/paper/1907.07780/integrity","json":"/paper/1907.07780/citation-record.json","paper":"/paper/1907.07780"},"outbound":[],"paper":{"arxiv_id":"1907.07780","last_updated":"2019-07-19T15:47:38Z","latest_version":2,"primary_category":"quant-ph","snapshot_observed_at":"2026-08-05T14:30:03.776012Z","submitted_at":"2019-07-17T21:29:58Z","title":"Persistent atomic frequency comb based on Zeeman sub-levels of an erbium-doped crystal waveguide"},"reference_resolution":{"displayed":0,"state_counts":{"malformed_identifier":0,"metadata_mismatch":0,"parse_uncertain":0,"unresolved":0,"verified_exact":0,"verified_fuzzy":0},"total_outbound_references":0},"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":"2026-08-11T06:34:44.6726+00:00","source":"crossref"},{"observed_at":"2026-08-11T06:34:36.301508+00:00","source":"retraction_watch"}],"thesis":"As of 11 August 2026, this Paper Citation Record lists 0 of 0 outbound references and 2 inbound Pith citation observations for arXiv:1907.07780."}