{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2014:6X5V2664MVRDBRYOK4YJ432QZE","short_pith_number":"pith:6X5V2664","schema_version":"1.0","canonical_sha256":"f5fb5d7bdc656230c70e57309e6f50c925ed0c93313250111921f4494aa0df08","source":{"kind":"arxiv","id":"1412.0093","version":2},"attestation_state":"computed","paper":{"title":"Estimating Excitonic Effects in the Absorption Spectra of Solids: Problems and Insight from a Guided Iteration Scheme","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Claudia Draxl, Francesco Sottile, Lucia Reining, Santiago Rigamonti, Silvana Botti, Val\\'erie Veniard","submitted_at":"2014-11-29T10:46:47Z","abstract_excerpt":"A major obstacle for computing optical spectra of solids is the lack of reliable approximations for capturing excitonic effects within time-dependent density-functional theory. We show that the trustful prediction of strongly bound electron-hole pairs within this framework using simple approximations is still a challenge and that available promising results have to be revisited. Deriving a set of analytical formula we analyze and explain the difficulties. We deduce an alternative approximation from an iterative scheme guided by previously available knowledge, significantly improving the descri"},"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":"1412.0093","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-11-29T10:46:47Z","cross_cats_sorted":[],"title_canon_sha256":"5c4ae305860e0016c066784082377f139e93bd12fe61f7b81c5439e1a06ba339","abstract_canon_sha256":"f92fd0bd300bddf57355e03a66ffe029708e9489bff1180be0822c9314c3e77c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:24.870186Z","signature_b64":"udkg8Eq99YQFJuT848YesJwUWg/ag7//kAQfa401+lot5e/wIe6ULHnVSF8h1rJCnUEglIgltTdHobRsMpXMAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f5fb5d7bdc656230c70e57309e6f50c925ed0c93313250111921f4494aa0df08","last_reissued_at":"2026-05-18T01:41:24.869648Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:24.869648Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Estimating Excitonic Effects in the Absorption Spectra of Solids: Problems and Insight from a Guided Iteration Scheme","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Claudia Draxl, Francesco Sottile, Lucia Reining, Santiago Rigamonti, Silvana Botti, Val\\'erie Veniard","submitted_at":"2014-11-29T10:46:47Z","abstract_excerpt":"A major obstacle for computing optical spectra of solids is the lack of reliable approximations for capturing excitonic effects within time-dependent density-functional theory. We show that the trustful prediction of strongly bound electron-hole pairs within this framework using simple approximations is still a challenge and that available promising results have to be revisited. Deriving a set of analytical formula we analyze and explain the difficulties. We deduce an alternative approximation from an iterative scheme guided by previously available knowledge, significantly improving the descri"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.0093","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":"1412.0093","created_at":"2026-05-18T01:41:24.869743+00:00"},{"alias_kind":"arxiv_version","alias_value":"1412.0093v2","created_at":"2026-05-18T01:41:24.869743+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.0093","created_at":"2026-05-18T01:41:24.869743+00:00"},{"alias_kind":"pith_short_12","alias_value":"6X5V2664MVRD","created_at":"2026-05-18T12:28:16.859392+00:00"},{"alias_kind":"pith_short_16","alias_value":"6X5V2664MVRDBRYO","created_at":"2026-05-18T12:28:16.859392+00:00"},{"alias_kind":"pith_short_8","alias_value":"6X5V2664","created_at":"2026-05-18T12:28:16.859392+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/6X5V2664MVRDBRYOK4YJ432QZE","json":"https://pith.science/pith/6X5V2664MVRDBRYOK4YJ432QZE.json","graph_json":"https://pith.science/api/pith-number/6X5V2664MVRDBRYOK4YJ432QZE/graph.json","events_json":"https://pith.science/api/pith-number/6X5V2664MVRDBRYOK4YJ432QZE/events.json","paper":"https://pith.science/paper/6X5V2664"},"agent_actions":{"view_html":"https://pith.science/pith/6X5V2664MVRDBRYOK4YJ432QZE","download_json":"https://pith.science/pith/6X5V2664MVRDBRYOK4YJ432QZE.json","view_paper":"https://pith.science/paper/6X5V2664","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1412.0093&json=true","fetch_graph":"https://pith.science/api/pith-number/6X5V2664MVRDBRYOK4YJ432QZE/graph.json","fetch_events":"https://pith.science/api/pith-number/6X5V2664MVRDBRYOK4YJ432QZE/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/6X5V2664MVRDBRYOK4YJ432QZE/action/timestamp_anchor","attest_storage":"https://pith.science/pith/6X5V2664MVRDBRYOK4YJ432QZE/action/storage_attestation","attest_author":"https://pith.science/pith/6X5V2664MVRDBRYOK4YJ432QZE/action/author_attestation","sign_citation":"https://pith.science/pith/6X5V2664MVRDBRYOK4YJ432QZE/action/citation_signature","submit_replication":"https://pith.science/pith/6X5V2664MVRDBRYOK4YJ432QZE/action/replication_record"}},"created_at":"2026-05-18T01:41:24.869743+00:00","updated_at":"2026-05-18T01:41:24.869743+00:00"}