{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:G6KUER7ZRUSARN4OB24GTNU75X","short_pith_number":"pith:G6KUER7Z","canonical_record":{"source":{"id":"1906.08408","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-06-20T01:25:54Z","cross_cats_sorted":[],"title_canon_sha256":"010996b6e131990212b5c850a7f6f0be9ea517d3e7ce2730260ae482c47bdbf1","abstract_canon_sha256":"32c137f7ac5e618071d6c8ed8fc193754087e9133d6358e3c8a1f80f647c64b0"},"schema_version":"1.0"},"canonical_sha256":"37954247f98d2408b78e0eb869b69fedfaa6b2dfe7c0d6e48434ddeaf1fde4c0","source":{"kind":"arxiv","id":"1906.08408","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.08408","created_at":"2026-05-17T23:42:52Z"},{"alias_kind":"arxiv_version","alias_value":"1906.08408v1","created_at":"2026-05-17T23:42:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.08408","created_at":"2026-05-17T23:42:52Z"},{"alias_kind":"pith_short_12","alias_value":"G6KUER7ZRUSA","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"G6KUER7ZRUSARN4O","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"G6KUER7Z","created_at":"2026-05-18T12:33:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:G6KUER7ZRUSARN4OB24GTNU75X","target":"record","payload":{"canonical_record":{"source":{"id":"1906.08408","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-06-20T01:25:54Z","cross_cats_sorted":[],"title_canon_sha256":"010996b6e131990212b5c850a7f6f0be9ea517d3e7ce2730260ae482c47bdbf1","abstract_canon_sha256":"32c137f7ac5e618071d6c8ed8fc193754087e9133d6358e3c8a1f80f647c64b0"},"schema_version":"1.0"},"canonical_sha256":"37954247f98d2408b78e0eb869b69fedfaa6b2dfe7c0d6e48434ddeaf1fde4c0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:42:52.548102Z","signature_b64":"fAu99t031lZ4fTBg0sqH0wakEe5pcqwpzl0orMql+ftE5s6Wtp5cwq5xAjBhttazglLqyW6l8WSbw7YnN3RkBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"37954247f98d2408b78e0eb869b69fedfaa6b2dfe7c0d6e48434ddeaf1fde4c0","last_reissued_at":"2026-05-17T23:42:52.547657Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:42:52.547657Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.08408","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:42:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nDRU7AQsypGLkAxEEHWVkGyb+Vz3X08avFYPX31X10yuxUqYbiNblOsoPuijkCYY+A83ur1Sb1u7HZGKjZVGDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T03:58:13.723487Z"},"content_sha256":"fdbcf232a2eed42cb3d036c7d332b88f953670f68dee9e1a1a994e6e40b670ea","schema_version":"1.0","event_id":"sha256:fdbcf232a2eed42cb3d036c7d332b88f953670f68dee9e1a1a994e6e40b670ea"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:G6KUER7ZRUSARN4OB24GTNU75X","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ab initio theory of polarons: formalism and applications","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Carla Verdi, Feliciano Giustino, Samuel Ponce, Weng Hong Sio","submitted_at":"2019-06-20T01:25:54Z","abstract_excerpt":"We develop a theoretical and computational framework to study polarons in semiconductors and insulators from first principles. Our approach provides the formation energy, excitation energy, and wavefunction of both electron and hole polarons, and takes into account the coupling of the electron or hole to all phonons. An important feature of the present method is that it does not require supercell calculations, and relies exclusively on electron band structures, phonon dispersions, and electron-phonon matrix elements obtained from calculations in the crystal unit cell. Starting from the Kohn-Sh"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.08408","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:42:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0nbBeGTPYrFtCbL1k7p2nNUfG8TG9C7QedBeerdsmfH6OYlBftLSCThdP1zz2XG1ijFfhdrBJRQX+0pUpJw9Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T03:58:13.724187Z"},"content_sha256":"96ce52d6398e777bc3c73daee46111100f4620fea21424b2e2435762a58e97d6","schema_version":"1.0","event_id":"sha256:96ce52d6398e777bc3c73daee46111100f4620fea21424b2e2435762a58e97d6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/G6KUER7ZRUSARN4OB24GTNU75X/bundle.json","state_url":"https://pith.science/pith/G6KUER7ZRUSARN4OB24GTNU75X/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/G6KUER7ZRUSARN4OB24GTNU75X/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-25T03:58:13Z","links":{"resolver":"https://pith.science/pith/G6KUER7ZRUSARN4OB24GTNU75X","bundle":"https://pith.science/pith/G6KUER7ZRUSARN4OB24GTNU75X/bundle.json","state":"https://pith.science/pith/G6KUER7ZRUSARN4OB24GTNU75X/state.json","well_known_bundle":"https://pith.science/.well-known/pith/G6KUER7ZRUSARN4OB24GTNU75X/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:G6KUER7ZRUSARN4OB24GTNU75X","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":"32c137f7ac5e618071d6c8ed8fc193754087e9133d6358e3c8a1f80f647c64b0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-06-20T01:25:54Z","title_canon_sha256":"010996b6e131990212b5c850a7f6f0be9ea517d3e7ce2730260ae482c47bdbf1"},"schema_version":"1.0","source":{"id":"1906.08408","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.08408","created_at":"2026-05-17T23:42:52Z"},{"alias_kind":"arxiv_version","alias_value":"1906.08408v1","created_at":"2026-05-17T23:42:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.08408","created_at":"2026-05-17T23:42:52Z"},{"alias_kind":"pith_short_12","alias_value":"G6KUER7ZRUSA","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"G6KUER7ZRUSARN4O","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"G6KUER7Z","created_at":"2026-05-18T12:33:18Z"}],"graph_snapshots":[{"event_id":"sha256:96ce52d6398e777bc3c73daee46111100f4620fea21424b2e2435762a58e97d6","target":"graph","created_at":"2026-05-17T23:42:52Z","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 develop a theoretical and computational framework to study polarons in semiconductors and insulators from first principles. Our approach provides the formation energy, excitation energy, and wavefunction of both electron and hole polarons, and takes into account the coupling of the electron or hole to all phonons. An important feature of the present method is that it does not require supercell calculations, and relies exclusively on electron band structures, phonon dispersions, and electron-phonon matrix elements obtained from calculations in the crystal unit cell. Starting from the Kohn-Sh","authors_text":"Carla Verdi, Feliciano Giustino, Samuel Ponce, Weng Hong Sio","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-06-20T01:25:54Z","title":"Ab initio theory of polarons: formalism and applications"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.08408","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:fdbcf232a2eed42cb3d036c7d332b88f953670f68dee9e1a1a994e6e40b670ea","target":"record","created_at":"2026-05-17T23:42:52Z","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":"32c137f7ac5e618071d6c8ed8fc193754087e9133d6358e3c8a1f80f647c64b0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-06-20T01:25:54Z","title_canon_sha256":"010996b6e131990212b5c850a7f6f0be9ea517d3e7ce2730260ae482c47bdbf1"},"schema_version":"1.0","source":{"id":"1906.08408","kind":"arxiv","version":1}},"canonical_sha256":"37954247f98d2408b78e0eb869b69fedfaa6b2dfe7c0d6e48434ddeaf1fde4c0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"37954247f98d2408b78e0eb869b69fedfaa6b2dfe7c0d6e48434ddeaf1fde4c0","first_computed_at":"2026-05-17T23:42:52.547657Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:52.547657Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fAu99t031lZ4fTBg0sqH0wakEe5pcqwpzl0orMql+ftE5s6Wtp5cwq5xAjBhttazglLqyW6l8WSbw7YnN3RkBw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:52.548102Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.08408","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fdbcf232a2eed42cb3d036c7d332b88f953670f68dee9e1a1a994e6e40b670ea","sha256:96ce52d6398e777bc3c73daee46111100f4620fea21424b2e2435762a58e97d6"],"state_sha256":"7e1db4767117373469809b39b939f872075de35257b1e0c3e3105dceef54111e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Waz4EVlVoHCpm83juzb3R8AVZ/SuL1RIsh4NetA2oI78vsqLXdW/fha3MXmZESg6aobIyT3Ly5/vOJmHLz6xAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T03:58:13.728252Z","bundle_sha256":"5089861b75ca0411d2cf6781928be25dc46f74909b14ddbd171fe7f0371bce93"}}