{"as_of":"2026-08-18T18:46:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:6147c5f51e21fb223ce61da629a413b49ce9ca676589d1d891f554a7dc3167b7","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":1,"lane":"standing_notices","note":"One-hop event checks from named stored sources.","records_observed":1,"source":"scholarly_work_events, retraction_status_cache","source_observed_at":"2026-08-18T06:34:40.430872+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":"2026-08-16T00:08:24.652114Z","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":"2026-08-16T00:08:25.187510Z","state":"measured"}],"external_citation_measurements":[],"inbound":[{"citation":{"cited_paper":{"arxiv_id":"2104.06284","last_updated":"2021-04-13T15:18:50Z","snapshot_observed_at":"2026-08-18T12:36:03.279077Z","submitted_at":"2021-04-13T15:18:50Z","title":"Noisy quantum metrology with the assistance of indefinite causal order","version":1},"cited_work":{"arxiv_id":"2104.06284","doi":null,"metadata_source":"pith","pith_arxiv_id":"2104.06284","snapshot_observed_at":"2026-08-16T00:08:25.187510Z","title":"Noisy quantum metrology with the assistance of indefinite causal order","venue":"quant-ph","work_id":"60da91e6-fa0d-405f-b685-7faaf8622d12","year":2021},"citing_paper":{"arxiv_id":"2505.03290","last_updated":"2025-05-06T08:16:39Z","snapshot_observed_at":"2026-08-18T03:32:41.602621Z","submitted_at":"2025-05-06T08:16:39Z","title":"Surpassing the Global Heisenberg Limit Using a High-effciency Quantum Switch","version":1},"reference_index":49,"source":"pdf_text","source_observed_at":"2026-08-16T00:08:24.652114Z"},"links":{"cited_paper":"/paper/2104.06284","citing_paper":"/paper/2505.03290"},"observation_digest":"sha256:f7fe6839594ee77ac0f73141946a082de7053d812a8ee9733d87178434f4af12","observation_id":"b07eb49c-882a-4269-9d59-fdb3bb9903c3","resolution":{"observed_at":"2026-08-16T00:08:25.290755Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-18T06:34:40.430872+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-18T06:34:40.430872+00:00","source":"crossref"},{"observed_at":"2026-08-18T06:34:34.496301+00:00","source":"retraction_watch"}],"state":"measured"}}],"links":{"evidence":"/evidence","html":"/paper/2104.06284/citation-record","integrity":"/paper/2104.06284/integrity","json":"/paper/2104.06284/citation-record.json","paper":"/paper/2104.06284"},"outbound":[],"paper":{"arxiv_id":"2104.06284","last_updated":"2021-04-13T15:18:50Z","latest_version":1,"primary_category":"quant-ph","snapshot_observed_at":"2026-08-18T12:36:03.279077Z","submitted_at":"2021-04-13T15:18:50Z","title":"Noisy quantum metrology with the assistance of indefinite causal order"},"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":"2026-08-18T06:34:40.430872+00:00","source":"crossref"},{"observed_at":"2026-08-18T06:34:34.496301+00:00","source":"retraction_watch"}],"thesis":"As of 18 August 2026, this Paper Citation Record lists 0 of 0 outbound references and 1 inbound Pith citation observation for arXiv:2104.06284."}