{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:YQQ2IRLKOMPFODN4GWYCA6EREM","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":"bb270ef82fa277663ae402ecff61d84f22fcc57849e005633d59097c3227b576","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-07-29T01:35:15Z","title_canon_sha256":"e8c3679aabfd498d8ab6a5e45c9c12f094bc9b81e9b6ecbee08b4ce6f79b6ce8"},"schema_version":"1.0","source":{"id":"1807.10989","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.10989","created_at":"2026-05-17T23:48:33Z"},{"alias_kind":"arxiv_version","alias_value":"1807.10989v1","created_at":"2026-05-17T23:48:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.10989","created_at":"2026-05-17T23:48:33Z"},{"alias_kind":"pith_short_12","alias_value":"YQQ2IRLKOMPF","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"YQQ2IRLKOMPFODN4","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"YQQ2IRLK","created_at":"2026-05-18T12:33:04Z"}],"graph_snapshots":[{"event_id":"sha256:c4495b885849a1f2a2e7b1dab8b5dc4202dd092f7c4b8920f084127906210f2c","target":"graph","created_at":"2026-05-17T23:48:33Z","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":"We use state-of-the art GW-BSE formalism to study electronic structure and optical properties of oxygen vacancies in $\\alpha$-alumina. Many body perturbation theory within GW approximation in recent years have been used extensively to study excited state properties of a wide range of systems. Moreover, solving Bethe-Salpeter equation (BSE) enable us to capture excitonic effects in a material. We compute the charge transition levels (CTLs) for oxygen vacancies using DFT+GW formalism. We propose an alternative approach to calculate these CTLs, which provides a more efficient way to perform elect","authors_text":"Manish Jain, Tathagata Biswas","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-07-29T01:35:15Z","title":"Excitonic properties of F-centers in $\\alpha$-alumina from First Principles Calculation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.10989","kind":"arxiv","version":1},"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:d1f1e8a82b275f913e2a488960e4f1b397a4913efcfa93148af19cc63fb8e055","target":"record","created_at":"2026-05-17T23:48:33Z","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":"bb270ef82fa277663ae402ecff61d84f22fcc57849e005633d59097c3227b576","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-07-29T01:35:15Z","title_canon_sha256":"e8c3679aabfd498d8ab6a5e45c9c12f094bc9b81e9b6ecbee08b4ce6f79b6ce8"},"schema_version":"1.0","source":{"id":"1807.10989","kind":"arxiv","version":1}},"canonical_sha256":"c421a4456a731e570dbc35b02078912337a515208070f660341d99e610f393f8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c421a4456a731e570dbc35b02078912337a515208070f660341d99e610f393f8","first_computed_at":"2026-05-17T23:48:33.977291Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:48:33.977291Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"w8UVMjwGL2zCvBhBep0UCnzqZyToVo70Cg8oS04XpwKtaDyp5UrYxVlSz07I+Jet7gPgggdKdU5FYCT1hLzoDA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:48:33.977746Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.10989","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d1f1e8a82b275f913e2a488960e4f1b397a4913efcfa93148af19cc63fb8e055","sha256:c4495b885849a1f2a2e7b1dab8b5dc4202dd092f7c4b8920f084127906210f2c"],"state_sha256":"a44526fb869210d432a8976335dc4ffc07195c856aa992f7688fc0fb14cd471e"}