{"as_of":"2026-08-16T01:23:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:20ad1597ae8f9e2d706f3af7c95864b8091d78611516ddd60c5c4a5798608e9d","coverage":[{"denominator":6,"lane":"reference_resolution","note":"Typed states for the displayed outbound observations.","records_observed":6,"source":"paper_references, paper_reference_links","source_observed_at":"2026-08-14T14:00:44.988250Z","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":"2026-08-15T06:32:42.880941+00:00","state":"measured"},{"denominator":0,"lane":"inbound_itemization","note":"Pith citing papers itemized under the disclosed page cap.","records_observed":0,"source":"paper_references, paper_reference_links","source_observed_at":null,"state":"measured"},{"denominator":1,"lane":"external_citation_measurements","note":"A source-named dated measurement, never combined with another source.","records_observed":0,"source":"cited_works","source_observed_at":null,"state":"measured"}],"external_citation_measurements":[],"inbound":[],"links":{"evidence":"/evidence","html":"/paper/1908.03979/citation-record","integrity":"/paper/1908.03979/integrity","json":"/paper/1908.03979/citation-record.json","paper":"/paper/1908.03979"},"outbound":[{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T14:00:45.103077Z","title":null,"venue":null,"work_id":"4a25aa6b-1149-4f41-801f-d5e4ba5fa80f","year":2019},"citing_paper":{"arxiv_id":"1908.03979","last_updated":"2019-10-23T20:02:58Z","snapshot_observed_at":"2026-08-15T19:26:39.441090Z","submitted_at":"2019-08-12T01:26:18Z","title":"Mapping the Hubbard model to the t-J model using ground state unitary transformations","version":2},"reference_index":1,"source":"pdf_text","source_observed_at":"2026-08-14T14:00:44.964743Z"},"links":{"citing_paper":"/paper/1908.03979"},"observation_digest":"sha256:0d4d9114506656dd0ece5d4dd6619876528ff3199e206316153163ad6610a28a","observation_id":"5fe223e5-cc93-48e6-82c6-9169e3124da8","resolution":{"observed_at":"2026-08-14T14:00:45.107447Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-15T06:32:42.880941+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-15T06:32:42.880941+00:00","source":"crossref"},{"observed_at":"2026-08-15T06:32:39.529945+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":"2026-08-14T14:00:45.086966Z","title":null,"venue":null,"work_id":"37e7edf3-5c4d-44f5-ab8a-08082e6670bf","year":1950},"citing_paper":{"arxiv_id":"1908.03979","last_updated":"2019-10-23T20:02:58Z","snapshot_observed_at":"2026-08-15T19:26:39.441090Z","submitted_at":"2019-08-12T01:26:18Z","title":"Mapping the Hubbard model to the t-J model using ground state unitary transformations","version":2},"reference_index":2,"source":"pdf_text","source_observed_at":"2026-08-14T14:00:44.969360Z"},"links":{"citing_paper":"/paper/1908.03979"},"observation_digest":"sha256:b0fa87d46fe1294f1f766e9c3bb396e30e6bc07ee8501b8f5e8a183547721652","observation_id":"ff4c163a-bebe-4b6e-b384-04a12daa4016","resolution":{"observed_at":"2026-08-14T14:00:45.091583Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-15T06:32:42.880941+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-15T06:32:42.880941+00:00","source":"crossref"},{"observed_at":"2026-08-15T06:32:39.529945+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":"2026-08-14T14:00:45.071054Z","title":null,"venue":null,"work_id":"ec3ed59d-cc59-45a0-945b-3adbe48b2097","year":2004},"citing_paper":{"arxiv_id":"1908.03979","last_updated":"2019-10-23T20:02:58Z","snapshot_observed_at":"2026-08-15T19:26:39.441090Z","submitted_at":"2019-08-12T01:26:18Z","title":"Mapping the Hubbard model to the t-J model using ground state unitary transformations","version":2},"reference_index":3,"source":"pdf_text","source_observed_at":"2026-08-14T14:00:44.973788Z"},"links":{"citing_paper":"/paper/1908.03979"},"observation_digest":"sha256:b18ea3009da1c7805d089e32704de239f84c581ed3ab44b1b319bbcd0a3c6b6e","observation_id":"2981a263-37a9-4874-8df1-68cfec9a584d","resolution":{"observed_at":"2026-08-14T14:00:45.075994Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-15T06:32:42.880941+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-15T06:32:42.880941+00:00","source":"crossref"},{"observed_at":"2026-08-15T06:32:39.529945+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"cond-mat/0409292","last_updated":"2004-09-11T17:41:02Z","snapshot_observed_at":"2026-07-07T02:11:44.391176Z","submitted_at":"2004-09-11T17:41:02Z","title":"The density-matrix renormalization group","version":1},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"cond-mat/0409292","snapshot_observed_at":"2026-08-14T14:00:44.978307Z","title":null,"venue":null,"work_id":null,"year":null},"citing_paper":{"arxiv_id":"1908.03979","last_updated":"2019-10-23T20:02:58Z","snapshot_observed_at":"2026-08-15T19:26:39.441090Z","submitted_at":"2019-08-12T01:26:18Z","title":"Mapping the Hubbard model to the t-J model using ground state unitary transformations","version":2},"reference_index":4,"source":"pdf_text","source_observed_at":"2026-08-14T14:00:44.978307Z"},"links":{"cited_paper":"/paper/cond-mat/0409292","citing_paper":"/paper/1908.03979"},"observation_digest":"sha256:4502780999dd3309732e677993d23898b320f5a9f4fba1b70352a345565ae3fb","observation_id":"c06101a0-9e41-4a16-9049-ec1ded1e77c9","resolution":{"observed_at":"2026-08-14T14:00:44.978307Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"quant-ph/0610099","last_updated":"2006-10-12T13:58:24Z","snapshot_observed_at":"2026-08-15T11:00:24.028330Z","submitted_at":"2006-10-12T13:58:24Z","title":"A class of quantum many-body states that can be efficiently simulated","version":1},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"quant-ph/0610099","snapshot_observed_at":"2026-08-14T14:00:44.983219Z","title":"Vidal A class of quantum many-body states that can be efficiently simulated arXiv:quant-ph/0610099","venue":null,"work_id":null,"year":null},"citing_paper":{"arxiv_id":"1908.03979","last_updated":"2019-10-23T20:02:58Z","snapshot_observed_at":"2026-08-15T19:26:39.441090Z","submitted_at":"2019-08-12T01:26:18Z","title":"Mapping the Hubbard model to the t-J model using ground state unitary transformations","version":2},"reference_index":5,"source":"pdf_text","source_observed_at":"2026-08-14T14:00:44.983219Z"},"links":{"cited_paper":"/paper/quant-ph/0610099","citing_paper":"/paper/1908.03979"},"observation_digest":"sha256:71ba9d35ad7587aedde1c7bb371e3e40ba8ac5bc53235d0f5c1740f59ee6b3e3","observation_id":"89e3c942-dc7d-4fcf-ab9e-71ee9ec9f6d9","resolution":{"observed_at":"2026-08-14T14:00:44.983219Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T14:00:45.053427Z","title":"Cleveland and Rodrigo Medina A","venue":null,"work_id":"f367695d-5c87-4a31-89aa-87ca2954e3eb","year":1976},"citing_paper":{"arxiv_id":"1908.03979","last_updated":"2019-10-23T20:02:58Z","snapshot_observed_at":"2026-08-15T19:26:39.441090Z","submitted_at":"2019-08-12T01:26:18Z","title":"Mapping the Hubbard model to the t-J model using ground state unitary transformations","version":2},"reference_index":6,"source":"pdf_text","source_observed_at":"2026-08-14T14:00:44.988250Z"},"links":{"citing_paper":"/paper/1908.03979"},"observation_digest":"sha256:f5bcff299b4229e072d15ceb12dbcedbb80b0ed99adf971256baac2cb35ce85f","observation_id":"165f0df3-ae20-4b7b-8aaf-646089cf11d2","resolution":{"observed_at":"2026-08-14T14:00:45.059746Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-15T06:32:42.880941+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-15T06:32:42.880941+00:00","source":"crossref"},{"observed_at":"2026-08-15T06:32:39.529945+00:00","source":"retraction_watch"}],"state":"measured"}}],"paper":{"arxiv_id":"1908.03979","last_updated":"2019-10-23T20:02:58Z","latest_version":2,"primary_category":"cond-mat.str-el","snapshot_observed_at":"2026-08-15T19:26:39.441090Z","submitted_at":"2019-08-12T01:26:18Z","title":"Mapping the Hubbard model to the t-J model using ground state unitary transformations"},"reference_resolution":{"displayed":6,"state_counts":{"malformed_identifier":0,"metadata_mismatch":0,"parse_uncertain":0,"unresolved":5,"verified_exact":0,"verified_fuzzy":1},"total_outbound_references":6},"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":"2026-08-15T06:32:42.880941+00:00","source":"crossref"},{"observed_at":"2026-08-15T06:32:39.529945+00:00","source":"retraction_watch"}],"thesis":"As of 16 August 2026, this Paper Citation Record lists 6 of 6 outbound references and 0 inbound Pith citation observations for arXiv:1908.03979."}