{"as_of":"2026-08-17T05:14:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:029e17efa16f666b7f971538d8af2164f93bcd3387a7c5d2b7df566175c11a5c","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":3,"lane":"standing_notices","note":"One-hop event checks from named stored sources.","records_observed":3,"source":"scholarly_work_events, retraction_status_cache","source_observed_at":"2026-08-16T06:30:59.297886+00:00","state":"measured"},{"denominator":3,"lane":"inbound_itemization","note":"Pith citing papers itemized under the disclosed page cap.","records_observed":3,"source":"paper_references, paper_reference_links","source_observed_at":"2026-08-14T15:27:13.547871Z","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":"2026-08-14T13:41:15.083832Z","state":"measured"}],"external_citation_measurements":[],"inbound":[{"citation":{"cited_paper":{"arxiv_id":"1902.06268","last_updated":"2019-09-12T06:38:06Z","snapshot_observed_at":"2026-08-14T17:15:19.186338Z","submitted_at":"2019-02-17T14:52:55Z","title":"Experimental Twin-Field Quantum Key Distribution Through Sending-or-Not-Sending","version":2},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"1902.06268","snapshot_observed_at":"2026-08-14T15:27:13.547871Z","title":"Liu, Z.-W","venue":null,"work_id":null,"year":2019},"citing_paper":{"arxiv_id":"1908.01271","last_updated":"2019-08-04T04:32:43Z","snapshot_observed_at":"2026-08-16T15:30:43.101523Z","submitted_at":"2019-08-04T04:32:43Z","title":"Surpassing the rate-transmittance linear bound of quantum key distribution","version":1},"reference_index":29,"source":"pdf_text","source_observed_at":"2026-08-14T15:27:13.547871Z"},"links":{"cited_paper":"/paper/1902.06268","citing_paper":"/paper/1908.01271"},"observation_digest":"sha256:613872e37275869bb59cef0ff92c583a334cdd5cb2bc9cf55901797c6bf0b506","observation_id":"0c2e9e6b-d693-4e77-8346-2aef903b07b4","resolution":{"observed_at":"2026-08-14T15:27:13.547871Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"1902.06268","last_updated":"2019-09-12T06:38:06Z","snapshot_observed_at":"2026-08-14T17:15:19.186338Z","submitted_at":"2019-02-17T14:52:55Z","title":"Experimental Twin-Field Quantum Key Distribution Through Sending-or-Not-Sending","version":2},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"1902.06268","snapshot_observed_at":"2026-08-14T13:47:12.360020Z","title":"Liu et al","venue":null,"work_id":null,"year":2019},"citing_paper":{"arxiv_id":"1908.04539","last_updated":"2019-08-13T08:50:09Z","snapshot_observed_at":"2026-08-16T18:08:59.091961Z","submitted_at":"2019-08-13T08:50:09Z","title":"Beating the repeaterless bound with adaptive measurement-device-independent quantum key distribution","version":1},"reference_index":27,"source":"pdf_text","source_observed_at":"2026-08-14T13:47:12.360020Z"},"links":{"cited_paper":"/paper/1902.06268","citing_paper":"/paper/1908.04539"},"observation_digest":"sha256:2fc6a387c58b80cfbfb9b7f5ce46f7341f5a5a198a3fa3b588139d02e395c117","observation_id":"067c1ea5-56f8-46f9-831b-2886ade33a22","resolution":{"observed_at":"2026-08-14T13:47:12.360020Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"1902.06268","last_updated":"2019-09-12T06:38:06Z","snapshot_observed_at":"2026-08-14T17:15:19.186338Z","submitted_at":"2019-02-17T14:52:55Z","title":"Experimental Twin-Field Quantum Key Distribution Through Sending-or-Not-Sending","version":2},"cited_work":{"arxiv_id":"1902.06268","doi":null,"metadata_source":"pith","pith_arxiv_id":"1902.06268","snapshot_observed_at":"2026-08-14T13:41:15.083832Z","title":"Experimental Twin-Field Quantum Key Distribution Through Sending-or-Not-Sending","venue":"quant-ph","work_id":"6ccf250e-b4d5-4488-a60e-b51efb46da73","year":2019},"citing_paper":{"arxiv_id":"1908.05073","last_updated":"2019-08-14T11:16:12Z","snapshot_observed_at":"2026-08-16T03:26:46.392625Z","submitted_at":"2019-08-14T11:16:12Z","title":"General sending-or-not-sending twin field protocol for quantum key distribution with asymmetric source parameters","version":1},"reference_index":90,"source":"pdf_text","source_observed_at":"2026-08-14T13:41:14.834514Z"},"links":{"cited_paper":"/paper/1902.06268","citing_paper":"/paper/1908.05073"},"observation_digest":"sha256:9e99def5ec2ac10e2d518fef3a97c0e10b7d15f44cb7ca56b5693965644f391a","observation_id":"f8efcf6e-57c7-4f2b-817b-a47c99368530","resolution":{"observed_at":"2026-08-14T13:41:15.088858Z","resolver_source":"local_arxiv","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"}}],"links":{"evidence":"/evidence","html":"/paper/1902.06268/citation-record","integrity":"/paper/1902.06268/integrity","json":"/paper/1902.06268/citation-record.json","paper":"/paper/1902.06268"},"outbound":[],"paper":{"arxiv_id":"1902.06268","last_updated":"2019-09-12T06:38:06Z","latest_version":2,"primary_category":"quant-ph","snapshot_observed_at":"2026-08-14T17:15:19.186338Z","submitted_at":"2019-02-17T14:52:55Z","title":"Experimental Twin-Field Quantum Key Distribution Through Sending-or-Not-Sending"},"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":"2026-08-16T06:30:59.297886+00:00","source":"crossref"},{"observed_at":"2026-08-16T06:30:54.164669+00:00","source":"retraction_watch"}],"thesis":"As of 17 August 2026, this Paper Citation Record lists 0 of 0 outbound references and 3 inbound Pith citation observations for arXiv:1902.06268."}