{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:OFVGG55TPOSDBNW25FNDHTKH6D","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"f8a7e9682cc8869d65d3c015bdf5261972021efd93adb4c03cf96ba94efcb25a","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-02-21T23:00:28Z","title_canon_sha256":"d4086d3f6d691e78300a6294d7dbfec1774bba3b62469339638477c2c3f43897"},"schema_version":"1.0","source":{"id":"1202.4788","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.4788","created_at":"2026-05-18T03:55:24Z"},{"alias_kind":"arxiv_version","alias_value":"1202.4788v2","created_at":"2026-05-18T03:55:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.4788","created_at":"2026-05-18T03:55:24Z"},{"alias_kind":"pith_short_12","alias_value":"OFVGG55TPOSD","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"OFVGG55TPOSDBNW2","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"OFVGG55T","created_at":"2026-05-18T12:27:16Z"}],"graph_snapshots":[{"event_id":"sha256:9ffbea2a15a020dece96aa355e0c17d83c7f2d99ea4c6157f1f16c1eb6799592","target":"graph","created_at":"2026-05-18T03:55:24Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Large strongly correlated systems provide a challenge to modern electronic structure methods, because standard density functionals usually fail and traditional quantum chemical approaches are too demanding. The density-matrix renormalization group method, an extremely powerful tool for solving such systems, has recently been extended to handle long-range interactions on real-space grids, but is most efficient in one dimension where it can provide essentially arbitrary accuracy. Such 1d systems therefore provide a theoretical laboratory for studying strong correlation and developing density fun","authors_text":"E. M. Stoudenmire, Kieron Burke, Lucas O. Wagner, Steven R. White","cross_cats":["physics.chem-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-02-21T23:00:28Z","title":"Reference electronic structure calculations in one dimension"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.4788","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:c53843b7a4c4ec45a20dfff9e74356043244c391f22087549813df770699c913","target":"record","created_at":"2026-05-18T03:55:24Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"f8a7e9682cc8869d65d3c015bdf5261972021efd93adb4c03cf96ba94efcb25a","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-02-21T23:00:28Z","title_canon_sha256":"d4086d3f6d691e78300a6294d7dbfec1774bba3b62469339638477c2c3f43897"},"schema_version":"1.0","source":{"id":"1202.4788","kind":"arxiv","version":2}},"canonical_sha256":"716a6377b37ba430b6dae95a33cd47f0dbed53edba9ddf949dc1c525195cd64b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"716a6377b37ba430b6dae95a33cd47f0dbed53edba9ddf949dc1c525195cd64b","first_computed_at":"2026-05-18T03:55:24.605482Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:55:24.605482Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"K2YZnRKzGxTW4cI8oauzE4wfpRVA2amHrgcw7dRrILFVvrtZK8L7YDRX+6ZxI0Fnm52oIrmwARMQnuhH+AVQAg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:55:24.606192Z","signed_message":"canonical_sha256_bytes"},"source_id":"1202.4788","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c53843b7a4c4ec45a20dfff9e74356043244c391f22087549813df770699c913","sha256:9ffbea2a15a020dece96aa355e0c17d83c7f2d99ea4c6157f1f16c1eb6799592"],"state_sha256":"e42c3b73b6d77830f14855f29dd36dd1d9be46582c498c49d243dec418e49f33"}