{"as_of":"2026-08-19T17:46:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:f54b59fc6c0862b7d921077cb367f679663e5ab192c05f9f964ee88983767481","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":6,"lane":"standing_notices","note":"One-hop event checks from named stored sources.","records_observed":6,"source":"scholarly_work_events, retraction_status_cache","source_observed_at":"2026-08-19T06:32:44.657259+00:00","state":"measured"},{"denominator":6,"lane":"inbound_itemization","note":"Pith citing papers itemized under the disclosed page cap.","records_observed":6,"source":"paper_references, paper_reference_links","source_observed_at":"2026-08-11T23:43:37.224755Z","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":"2026-07-04T07:09:38.155844Z","state":"measured"}],"external_citation_measurements":[],"inbound":[{"citation":{"cited_paper":{"arxiv_id":"2109.01840","last_updated":"2021-09-04T10:50:34Z","snapshot_observed_at":"2026-08-17T19:25:50.195542Z","submitted_at":"2021-09-04T10:50:34Z","title":"A review of Quantum Neural Networks: Methods, Models, Dilemma","version":1},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"2109.01840","snapshot_observed_at":"2026-08-11T23:43:37.224755Z","title":null,"venue":null,"work_id":null,"year":2021},"citing_paper":{"arxiv_id":"2412.06818","last_updated":"2024-12-03T08:14:16Z","snapshot_observed_at":"2026-08-17T22:43:34.253229Z","submitted_at":"2024-12-03T08:14:16Z","title":"A Study on Quantum Neural Networks in Healthcare 5.0","version":1},"reference_index":49,"source":"pdf_text","source_observed_at":"2026-08-11T23:43:37.224755Z"},"links":{"cited_paper":"/paper/2109.01840","citing_paper":"/paper/2412.06818"},"observation_digest":"sha256:3223be8f70cfaaee2aced94014b7528d4b03f7ead990acef09dfe05595d1128b","observation_id":"e1044c20-a034-4e28-8754-cb1349ab0cc1","resolution":{"observed_at":"2026-08-11T23:43:37.224755Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"2109.01840","last_updated":"2021-09-04T10:50:34Z","snapshot_observed_at":"2026-08-17T19:25:50.195542Z","submitted_at":"2021-09-04T10:50:34Z","title":"A review of Quantum Neural Networks: Methods, Models, Dilemma","version":1},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"2109.01840","snapshot_observed_at":"2026-08-11T11:46:06.193892Z","title":null,"venue":null,"work_id":null,"year":2021},"citing_paper":{"arxiv_id":"2412.15025","last_updated":"2024-12-19T16:38:24Z","snapshot_observed_at":"2026-08-18T01:24:15.995348Z","submitted_at":"2024-12-19T16:38:24Z","title":"Quantum computation over the vibrational modes of a single trapped ion","version":1},"reference_index":16,"source":"pdf_text","source_observed_at":"2026-08-11T11:46:06.193892Z"},"links":{"cited_paper":"/paper/2109.01840","citing_paper":"/paper/2412.15025"},"observation_digest":"sha256:763fde3ad977b99c5159bd51ca8cffd60c415bb0f425a4afef515eb5a3227059","observation_id":"6cae8c7f-f9a6-4045-ace6-ff07b8a2c097","resolution":{"observed_at":"2026-08-11T11:46:06.193892Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"2109.01840","last_updated":"2021-09-04T10:50:34Z","snapshot_observed_at":"2026-08-17T19:25:50.195542Z","submitted_at":"2021-09-04T10:50:34Z","title":"A review of Quantum Neural Networks: Methods, Models, Dilemma","version":1},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"2109.01840","snapshot_observed_at":"2026-08-10T23:10:02.910936Z","title":"A review of quantum neural networks: Methods, models, dilemma,","venue":null,"work_id":null,"year":2021},"citing_paper":{"arxiv_id":"2412.20930","last_updated":"2024-12-30T13:21:16Z","snapshot_observed_at":"2026-08-17T19:26:02.686500Z","submitted_at":"2024-12-30T13:21:16Z","title":"QAHAN: A Quantum Annealing Hard Attention Network","version":1},"reference_index":10,"source":"pdf_text","source_observed_at":"2026-08-10T23:10:02.910936Z"},"links":{"cited_paper":"/paper/2109.01840","citing_paper":"/paper/2412.20930"},"observation_digest":"sha256:492ed3d5bc39c2971cf07780a342f71b398c0fe4c9d56bb5377e2ee97e4ea19f","observation_id":"36e4c5af-a45b-4e5c-94b6-8c2101bb7fa6","resolution":{"observed_at":"2026-08-10T23:10:02.910936Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"2109.01840","last_updated":"2021-09-04T10:50:34Z","snapshot_observed_at":"2026-08-17T19:25:50.195542Z","submitted_at":"2021-09-04T10:50:34Z","title":"A review of Quantum Neural Networks: Methods, Models, Dilemma","version":1},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"2109.01840","snapshot_observed_at":"2026-08-05T13:14:10.458644Z","title":null,"venue":null,"work_id":null,"year":2021},"citing_paper":{"arxiv_id":"2509.00854","last_updated":"2025-08-31T13:56:03Z","snapshot_observed_at":"2026-08-18T12:35:48.585601Z","submitted_at":"2025-08-31T13:56:03Z","title":"Assessing the Advantages and Limitations of Quantum Neural Networks in Regression Tasks","version":1},"reference_index":21,"source":"pdf_text","source_observed_at":"2026-08-05T13:14:10.458644Z"},"links":{"cited_paper":"/paper/2109.01840","citing_paper":"/paper/2509.00854"},"observation_digest":"sha256:41168527ebb9bf3852042400c204f0f414f38056112e72d26c2f6667ac274051","observation_id":"04fb7dd1-4749-48b5-a08d-159d28ddc1bc","resolution":{"observed_at":"2026-08-05T13:14:10.458644Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"2109.01840","last_updated":"2021-09-04T10:50:34Z","snapshot_observed_at":"2026-08-17T19:25:50.195542Z","submitted_at":"2021-09-04T10:50:34Z","title":"A review of Quantum Neural Networks: Methods, Models, Dilemma","version":1},"cited_work":{"arxiv_id":"2109.01840","doi":null,"metadata_source":"arxiv_reference","pith_arxiv_id":"2109.01840","snapshot_observed_at":"2026-07-04T07:09:38.155844Z","title":"A Review of Quantum Neural Networks: Methods, Models, Dilemma,","venue":null,"work_id":"f31daa33-01f9-4bb7-9645-ac52204b9a23","year":2021},"citing_paper":{"arxiv_id":"2605.30724","last_updated":"2026-05-29T01:39:36Z","snapshot_observed_at":"2026-07-06T23:39:58.378823Z","submitted_at":"2026-05-29T01:39:36Z","title":"Research progress on quantum neural networks and quantum machine learning","version":1},"reference_index":33,"source":"pdf_text","source_observed_at":"2026-06-28T22:25:46.780183Z"},"links":{"cited_paper":"/paper/2109.01840","citing_paper":"/paper/2605.30724"},"observation_digest":"sha256:38ff56eb6d1c5c714ed2b1484e9bfba4051c43248a274d640646f1b30072c257","observation_id":"d4100af1-f7a6-451b-94b7-a01059dfdf94","resolution":{"observed_at":"2026-06-28T22:32:44.699372Z","resolver_source":"arxiv_id","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-19T06:32:44.657259+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-19T06:32:44.657259+00:00","source":"crossref"},{"observed_at":"2026-08-19T06:32:39.956319+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"2109.01840","last_updated":"2021-09-04T10:50:34Z","snapshot_observed_at":"2026-08-17T19:25:50.195542Z","submitted_at":"2021-09-04T10:50:34Z","title":"A review of Quantum Neural Networks: Methods, Models, Dilemma","version":1},"cited_work":{"arxiv_id":"2109.01840","doi":null,"metadata_source":"arxiv_reference","pith_arxiv_id":"2109.01840","snapshot_observed_at":"2026-07-04T07:09:38.155844Z","title":"A Review of Quantum Neural Networks: Methods, Models, Dilemma,","venue":null,"work_id":"f31daa33-01f9-4bb7-9645-ac52204b9a23","year":2021},"citing_paper":{"arxiv_id":"2606.21570","last_updated":"2026-06-19T16:12:10Z","snapshot_observed_at":"2026-08-18T05:20:18.588488Z","submitted_at":"2026-06-19T16:12:10Z","title":"A Correlation Aware Quantum Feature Map for Variational Quantum Classification","version":1},"reference_index":38,"source":"pdf_text","source_observed_at":"2026-06-26T13:42:18.149198Z"},"links":{"cited_paper":"/paper/2109.01840","citing_paper":"/paper/2606.21570"},"observation_digest":"sha256:191620cf035bfd0303f0f9225577f5468ee59360094958c15e2e456ead1d357e","observation_id":"6b846f3b-aaed-4263-87bb-3e9594958c92","resolution":{"observed_at":"2026-07-04T07:09:38.157208Z","resolver_source":"arxiv_id","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-19T06:32:44.657259+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-19T06:32:44.657259+00:00","source":"crossref"},{"observed_at":"2026-08-19T06:32:39.956319+00:00","source":"retraction_watch"}],"state":"measured"}}],"links":{"evidence":"/evidence","html":"/paper/2109.01840/citation-record","integrity":"/paper/2109.01840/integrity","json":"/paper/2109.01840/citation-record.json","paper":"/paper/2109.01840"},"outbound":[],"paper":{"arxiv_id":"2109.01840","last_updated":"2021-09-04T10:50:34Z","latest_version":1,"primary_category":"cs.ET","snapshot_observed_at":"2026-08-17T19:25:50.195542Z","submitted_at":"2021-09-04T10:50:34Z","title":"A review of Quantum Neural Networks: Methods, Models, Dilemma"},"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":"2026-08-19T06:32:44.657259+00:00","source":"crossref"},{"observed_at":"2026-08-19T06:32:39.956319+00:00","source":"retraction_watch"}],"thesis":"As of 19 August 2026, this Paper Citation Record lists 0 of 0 outbound references and 6 inbound Pith citation observations for arXiv:2109.01840."}