{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:7CP7NZ2DEJZ524JMGNX6EJIKCG","short_pith_number":"pith:7CP7NZ2D","schema_version":"1.0","canonical_sha256":"f89ff6e7432273dd712c336fe2250a11900e3f899f37f715003a5974ceae820c","source":{"kind":"arxiv","id":"0903.0027","version":1},"attestation_state":"computed","paper":{"title":"Time-dependent density-functional approach for exciton binding energies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.other"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"C. A. Ullrich, V. Turkowski","submitted_at":"2009-02-28T00:26:45Z","abstract_excerpt":"Optical processes in insulators and semiconductors, including excitonic effects, can be described in principle exactly using time-dependent density-functional theory (TDDFT). Starting from a linearization of the TDDFT semiconductor Bloch equations in a two-band model, we derive a simple formalism for calculating excitonic binding energies. This formalism leads to a generalization of the standard Wannier equation for excitons, featuring a nonlocal effective electron-hole interaction determined by long-range and dynamical exchange-correlation (XC) effects. We calculate excitonic binding energies"},"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":"0903.0027","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2009-02-28T00:26:45Z","cross_cats_sorted":["cond-mat.other"],"title_canon_sha256":"5a061e0a0b09465fdce5dcad1743bd64e4a3edb5bcb8310c512735016ccaebed","abstract_canon_sha256":"63df823b6d03fabf51a5520dbb3d6a1a34c2d836b28559292eb07073353eb68d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:14:38.135282Z","signature_b64":"wlZeB2Kvv8cz+FeQnH2KslbFgVRi66veJ1c6UuDwYn2T8AwCLznL9RsgW+afPSLJsmUOqbl+eC1nrwKHwka1Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f89ff6e7432273dd712c336fe2250a11900e3f899f37f715003a5974ceae820c","last_reissued_at":"2026-05-18T02:14:38.134514Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:14:38.134514Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Time-dependent density-functional approach for exciton binding energies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.other"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"C. A. Ullrich, V. Turkowski","submitted_at":"2009-02-28T00:26:45Z","abstract_excerpt":"Optical processes in insulators and semiconductors, including excitonic effects, can be described in principle exactly using time-dependent density-functional theory (TDDFT). Starting from a linearization of the TDDFT semiconductor Bloch equations in a two-band model, we derive a simple formalism for calculating excitonic binding energies. This formalism leads to a generalization of the standard Wannier equation for excitons, featuring a nonlocal effective electron-hole interaction determined by long-range and dynamical exchange-correlation (XC) effects. We calculate excitonic binding energies"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.0027","kind":"arxiv","version":1},"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":"0903.0027","created_at":"2026-05-18T02:14:38.134628+00:00"},{"alias_kind":"arxiv_version","alias_value":"0903.0027v1","created_at":"2026-05-18T02:14:38.134628+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.0027","created_at":"2026-05-18T02:14:38.134628+00:00"},{"alias_kind":"pith_short_12","alias_value":"7CP7NZ2DEJZ5","created_at":"2026-05-18T12:25:58.837520+00:00"},{"alias_kind":"pith_short_16","alias_value":"7CP7NZ2DEJZ524JM","created_at":"2026-05-18T12:25:58.837520+00:00"},{"alias_kind":"pith_short_8","alias_value":"7CP7NZ2D","created_at":"2026-05-18T12:25:58.837520+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/7CP7NZ2DEJZ524JMGNX6EJIKCG","json":"https://pith.science/pith/7CP7NZ2DEJZ524JMGNX6EJIKCG.json","graph_json":"https://pith.science/api/pith-number/7CP7NZ2DEJZ524JMGNX6EJIKCG/graph.json","events_json":"https://pith.science/api/pith-number/7CP7NZ2DEJZ524JMGNX6EJIKCG/events.json","paper":"https://pith.science/paper/7CP7NZ2D"},"agent_actions":{"view_html":"https://pith.science/pith/7CP7NZ2DEJZ524JMGNX6EJIKCG","download_json":"https://pith.science/pith/7CP7NZ2DEJZ524JMGNX6EJIKCG.json","view_paper":"https://pith.science/paper/7CP7NZ2D","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0903.0027&json=true","fetch_graph":"https://pith.science/api/pith-number/7CP7NZ2DEJZ524JMGNX6EJIKCG/graph.json","fetch_events":"https://pith.science/api/pith-number/7CP7NZ2DEJZ524JMGNX6EJIKCG/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/7CP7NZ2DEJZ524JMGNX6EJIKCG/action/timestamp_anchor","attest_storage":"https://pith.science/pith/7CP7NZ2DEJZ524JMGNX6EJIKCG/action/storage_attestation","attest_author":"https://pith.science/pith/7CP7NZ2DEJZ524JMGNX6EJIKCG/action/author_attestation","sign_citation":"https://pith.science/pith/7CP7NZ2DEJZ524JMGNX6EJIKCG/action/citation_signature","submit_replication":"https://pith.science/pith/7CP7NZ2DEJZ524JMGNX6EJIKCG/action/replication_record"}},"created_at":"2026-05-18T02:14:38.134628+00:00","updated_at":"2026-05-18T02:14:38.134628+00:00"}