{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2010:3TOUIUNGQRYOOTF35AJUP2OQYM","short_pith_number":"pith:3TOUIUNG","schema_version":"1.0","canonical_sha256":"dcdd4451a68470e74cbbe81347e9d0c30ecac023aeeba17fe9c1865e6ba059a9","source":{"kind":"arxiv","id":"1003.5255","version":2},"attestation_state":"computed","paper":{"title":"A Higher-Accuracy van der Waals Density Functional","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Bengt I. Lundqvist, David C. Langreth, \\'Eamonn D. Murray, Kyuho Lee, Lingzhu Kong","submitted_at":"2010-03-27T02:15:34Z","abstract_excerpt":"We propose a second version of the van der Waals density functional (vdW-DF2) of Dion et al. [Phys. Rev. Lett. 92, 246401 (2004)], employing a more accurate semilocal exchange functional and the use of a large-N asymptote gradient correction in determining the vdW kernel. The predicted binding energy, equilibrium separation, and potential-energy curve shape are close to those of accurate quantum chemical calculations on 22 duplexes. We anticipate the enabling of chemically accurate calculations in sparse materials of importance for condensed-matter, surface, chemical, and biological physics."},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1003.5255","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-03-27T02:15:34Z","cross_cats_sorted":[],"title_canon_sha256":"012d402c14c1d7e7f8a81629bd3b73760a20f7ab98f59216d9110c02ed9399cf","abstract_canon_sha256":"6fa75da4b4a4f7c06f1f4a763be15f09e76a2ab14af5b373991cea2b48475a42"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:42:13.666330Z","signature_b64":"/0HuSiGnwLrPOj1+g6+cJ9FDWAVq+rZTkAJN5LfPvC5SxzQ8zNzuV+2/KfSP+M/YHC/xjqhZwUOVrI6aAERFCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dcdd4451a68470e74cbbe81347e9d0c30ecac023aeeba17fe9c1865e6ba059a9","last_reissued_at":"2026-05-18T04:42:13.665857Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:42:13.665857Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A Higher-Accuracy van der Waals Density Functional","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Bengt I. Lundqvist, David C. Langreth, \\'Eamonn D. Murray, Kyuho Lee, Lingzhu Kong","submitted_at":"2010-03-27T02:15:34Z","abstract_excerpt":"We propose a second version of the van der Waals density functional (vdW-DF2) of Dion et al. [Phys. Rev. Lett. 92, 246401 (2004)], employing a more accurate semilocal exchange functional and the use of a large-N asymptote gradient correction in determining the vdW kernel. The predicted binding energy, equilibrium separation, and potential-energy curve shape are close to those of accurate quantum chemical calculations on 22 duplexes. We anticipate the enabling of chemically accurate calculations in sparse materials of importance for condensed-matter, surface, chemical, and biological physics."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1003.5255","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1003.5255","created_at":"2026-05-18T04:42:13.665920+00:00"},{"alias_kind":"arxiv_version","alias_value":"1003.5255v2","created_at":"2026-05-18T04:42:13.665920+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1003.5255","created_at":"2026-05-18T04:42:13.665920+00:00"},{"alias_kind":"pith_short_12","alias_value":"3TOUIUNGQRYO","created_at":"2026-05-18T12:26:03.138858+00:00"},{"alias_kind":"pith_short_16","alias_value":"3TOUIUNGQRYOOTF3","created_at":"2026-05-18T12:26:03.138858+00:00"},{"alias_kind":"pith_short_8","alias_value":"3TOUIUNG","created_at":"2026-05-18T12:26:03.138858+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/3TOUIUNGQRYOOTF35AJUP2OQYM","json":"https://pith.science/pith/3TOUIUNGQRYOOTF35AJUP2OQYM.json","graph_json":"https://pith.science/api/pith-number/3TOUIUNGQRYOOTF35AJUP2OQYM/graph.json","events_json":"https://pith.science/api/pith-number/3TOUIUNGQRYOOTF35AJUP2OQYM/events.json","paper":"https://pith.science/paper/3TOUIUNG"},"agent_actions":{"view_html":"https://pith.science/pith/3TOUIUNGQRYOOTF35AJUP2OQYM","download_json":"https://pith.science/pith/3TOUIUNGQRYOOTF35AJUP2OQYM.json","view_paper":"https://pith.science/paper/3TOUIUNG","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1003.5255&json=true","fetch_graph":"https://pith.science/api/pith-number/3TOUIUNGQRYOOTF35AJUP2OQYM/graph.json","fetch_events":"https://pith.science/api/pith-number/3TOUIUNGQRYOOTF35AJUP2OQYM/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3TOUIUNGQRYOOTF35AJUP2OQYM/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3TOUIUNGQRYOOTF35AJUP2OQYM/action/storage_attestation","attest_author":"https://pith.science/pith/3TOUIUNGQRYOOTF35AJUP2OQYM/action/author_attestation","sign_citation":"https://pith.science/pith/3TOUIUNGQRYOOTF35AJUP2OQYM/action/citation_signature","submit_replication":"https://pith.science/pith/3TOUIUNGQRYOOTF35AJUP2OQYM/action/replication_record"}},"created_at":"2026-05-18T04:42:13.665920+00:00","updated_at":"2026-05-18T04:42:13.665920+00:00"}