{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:E7UVTPWNYODYCL6CLFFSTH2YVD","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":"cbedcf2c726bbc5bb90415757f50fe0269ae965d2ddbdeca3bc78d87774568a8","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2019-09-26T07:38:52Z","title_canon_sha256":"60a6b6c63c53cc9d4934ea83408f22426b76ba033a5f2a35bbae8dc39f458eef"},"schema_version":"1.0","source":{"id":"1909.11954","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.11954","created_at":"2026-07-05T01:27:19Z"},{"alias_kind":"arxiv_version","alias_value":"1909.11954v2","created_at":"2026-07-05T01:27:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.11954","created_at":"2026-07-05T01:27:19Z"},{"alias_kind":"pith_short_12","alias_value":"E7UVTPWNYODY","created_at":"2026-07-05T01:27:19Z"},{"alias_kind":"pith_short_16","alias_value":"E7UVTPWNYODYCL6C","created_at":"2026-07-05T01:27:19Z"},{"alias_kind":"pith_short_8","alias_value":"E7UVTPWN","created_at":"2026-07-05T01:27:19Z"}],"graph_snapshots":[{"event_id":"sha256:a0cbe1f3074b1c4b799eac9f326814b0769f569095f56d904e783a7f7b8c475f","target":"graph","created_at":"2026-07-05T01:27:19Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1909.11954/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The accurate electronic structure calculation for strongly correlated chemical systems requires an adequate description for both static and dynamic electron correlation, and is a persistent challenge for quantum chemistry. In order to account for static and dynamic electron correlations accurately and efficiently, in this work we propose a new method by integrating the density matrix renormalization group (DMRG) method and multi-reference second-order Epstein-Nesbet perturbation theory (ENPT2) with a selected configuration interaction (SCI) approximation. Compared with previous DMRG-based dyna","authors_text":"Haibo Ma, Yifan Cheng, Yingjin Ma, Yinxuan Song","cross_cats":["physics.chem-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2019-09-26T07:38:52Z","title":"Multi-Reference Epstein-Nesbet Perturbation Theory with Density Matrix Renormalization Group Reference Wavefunction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.11954","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":"sha256:0503ed033e2790a7e2ed646df37b96ff4c1fbd61de69bb7179706ca6c04754f6","target":"record","created_at":"2026-07-05T01:27:19Z","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":"cbedcf2c726bbc5bb90415757f50fe0269ae965d2ddbdeca3bc78d87774568a8","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2019-09-26T07:38:52Z","title_canon_sha256":"60a6b6c63c53cc9d4934ea83408f22426b76ba033a5f2a35bbae8dc39f458eef"},"schema_version":"1.0","source":{"id":"1909.11954","kind":"arxiv","version":2}},"canonical_sha256":"27e959becdc387812fc2594b299f58a8c41cd1b93a2a4acae515034a6ac44676","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"27e959becdc387812fc2594b299f58a8c41cd1b93a2a4acae515034a6ac44676","first_computed_at":"2026-07-05T01:27:19.440389Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:27:19.440389Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2ZQHC6mWKoKPSsMmu6/39Tn7qe9Hs1WEsz6/9C8IFKRALNsWCVUYMPf4+axR4y9aY2EQflyKlpelzSyO68ofDw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:27:19.440791Z","signed_message":"canonical_sha256_bytes"},"source_id":"1909.11954","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0503ed033e2790a7e2ed646df37b96ff4c1fbd61de69bb7179706ca6c04754f6","sha256:a0cbe1f3074b1c4b799eac9f326814b0769f569095f56d904e783a7f7b8c475f"],"state_sha256":"5422a194cc4d0c11546c1a37683d95d279f8d08c087465cc29aa4ebe828b150e"}