{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:NOXRIJ5VMPXRGQTEQWDEK2KH7E","short_pith_number":"pith:NOXRIJ5V","canonical_record":{"source":{"id":"1908.09019","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-23T19:59:31Z","cross_cats_sorted":[],"title_canon_sha256":"87f6ba28ec909ee8d72d1f4ae3064bf3e148b1f4e92eea04bf97a217a487dbd5","abstract_canon_sha256":"654b12a08f6ce188da575a0a69b0b575481c773d531dd90f7e058687c6b7fd14"},"schema_version":"1.0"},"canonical_sha256":"6baf1427b563ef1342648586456947f907fb121c1211dc4d5d0d1d808cab0cd5","source":{"kind":"arxiv","id":"1908.09019","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.09019","created_at":"2026-07-04T23:59:36Z"},{"alias_kind":"arxiv_version","alias_value":"1908.09019v1","created_at":"2026-07-04T23:59:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.09019","created_at":"2026-07-04T23:59:36Z"},{"alias_kind":"pith_short_12","alias_value":"NOXRIJ5VMPXR","created_at":"2026-07-04T23:59:36Z"},{"alias_kind":"pith_short_16","alias_value":"NOXRIJ5VMPXRGQTE","created_at":"2026-07-04T23:59:36Z"},{"alias_kind":"pith_short_8","alias_value":"NOXRIJ5V","created_at":"2026-07-04T23:59:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:NOXRIJ5VMPXRGQTEQWDEK2KH7E","target":"record","payload":{"canonical_record":{"source":{"id":"1908.09019","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-23T19:59:31Z","cross_cats_sorted":[],"title_canon_sha256":"87f6ba28ec909ee8d72d1f4ae3064bf3e148b1f4e92eea04bf97a217a487dbd5","abstract_canon_sha256":"654b12a08f6ce188da575a0a69b0b575481c773d531dd90f7e058687c6b7fd14"},"schema_version":"1.0"},"canonical_sha256":"6baf1427b563ef1342648586456947f907fb121c1211dc4d5d0d1d808cab0cd5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:59:36.116075Z","signature_b64":"1NbJmM//yRh2IiT83cgfXwr9f/ZrKE2ZnDJ3x2o2rscBT6KX+KxkiAW8sTFB8ITAS0vPG4dHlHchhFGNptMsDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6baf1427b563ef1342648586456947f907fb121c1211dc4d5d0d1d808cab0cd5","last_reissued_at":"2026-07-04T23:59:36.115658Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:59:36.115658Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.09019","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":"2026-07-04T23:59:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oy6dNTcGWMFIbM8u6BgshGSo4or2o/vZpFMM8GkZ7W7M++bWZhAaRM5VzcsuGuQlUHIdQrV1iyw63ZwJ2dMcBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-27T10:21:10.794907Z"},"content_sha256":"14dec8780e944889bd2a127bcbe1f5e4934a3cc8063aa6a3de145ad803c90127","schema_version":"1.0","event_id":"sha256:14dec8780e944889bd2a127bcbe1f5e4934a3cc8063aa6a3de145ad803c90127"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:NOXRIJ5VMPXRGQTEQWDEK2KH7E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultrafast optical currents in gapped graphene","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Ahmal Jawad Zafar, Aranyo Mitra, Fatemeh Nematollahi, Mark I. Stockman, S. Azar Oliaei Motlagh, Vadym Apalkov","submitted_at":"2019-08-23T19:59:31Z","abstract_excerpt":"We study theoretically the interaction of ultrashort optical pulses with gapped graphene. Such strong pulse results in finite conduction band population and corresponding electric current both during and after the pulse. Since gapped graphene has broken inversion symmetry, it has an axial symmetry about the $y$-axis but not about the $x$-axis. We show that, in this case, if the linear pulse is polarized along the $x$-axis, the rectified electric current is generated in the $y$ direction. At the same time, the conduction band population distribution in the reciprocal space is symmetric about th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.09019","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1908.09019/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T23:59:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mUbYMDp93FDGusf2HTWt887cZXhcQDS+Fn9XonAjvO2ds+GcyTT8lhZTbPSAuBFyS3PEKKwGP3QNDLFNnM9FDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-27T10:21:10.795297Z"},"content_sha256":"35bf76223230bd8730c146f5a3ab8d1473987b1770e8404402fc6cc08b381de4","schema_version":"1.0","event_id":"sha256:35bf76223230bd8730c146f5a3ab8d1473987b1770e8404402fc6cc08b381de4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NOXRIJ5VMPXRGQTEQWDEK2KH7E/bundle.json","state_url":"https://pith.science/pith/NOXRIJ5VMPXRGQTEQWDEK2KH7E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NOXRIJ5VMPXRGQTEQWDEK2KH7E/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":"2026-07-27T10:21:10Z","links":{"resolver":"https://pith.science/pith/NOXRIJ5VMPXRGQTEQWDEK2KH7E","bundle":"https://pith.science/pith/NOXRIJ5VMPXRGQTEQWDEK2KH7E/bundle.json","state":"https://pith.science/pith/NOXRIJ5VMPXRGQTEQWDEK2KH7E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NOXRIJ5VMPXRGQTEQWDEK2KH7E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:NOXRIJ5VMPXRGQTEQWDEK2KH7E","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":"654b12a08f6ce188da575a0a69b0b575481c773d531dd90f7e058687c6b7fd14","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-23T19:59:31Z","title_canon_sha256":"87f6ba28ec909ee8d72d1f4ae3064bf3e148b1f4e92eea04bf97a217a487dbd5"},"schema_version":"1.0","source":{"id":"1908.09019","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.09019","created_at":"2026-07-04T23:59:36Z"},{"alias_kind":"arxiv_version","alias_value":"1908.09019v1","created_at":"2026-07-04T23:59:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.09019","created_at":"2026-07-04T23:59:36Z"},{"alias_kind":"pith_short_12","alias_value":"NOXRIJ5VMPXR","created_at":"2026-07-04T23:59:36Z"},{"alias_kind":"pith_short_16","alias_value":"NOXRIJ5VMPXRGQTE","created_at":"2026-07-04T23:59:36Z"},{"alias_kind":"pith_short_8","alias_value":"NOXRIJ5V","created_at":"2026-07-04T23:59:36Z"}],"graph_snapshots":[{"event_id":"sha256:35bf76223230bd8730c146f5a3ab8d1473987b1770e8404402fc6cc08b381de4","target":"graph","created_at":"2026-07-04T23:59:36Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1908.09019/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study theoretically the interaction of ultrashort optical pulses with gapped graphene. Such strong pulse results in finite conduction band population and corresponding electric current both during and after the pulse. Since gapped graphene has broken inversion symmetry, it has an axial symmetry about the $y$-axis but not about the $x$-axis. We show that, in this case, if the linear pulse is polarized along the $x$-axis, the rectified electric current is generated in the $y$ direction. At the same time, the conduction band population distribution in the reciprocal space is symmetric about th","authors_text":"Ahmal Jawad Zafar, Aranyo Mitra, Fatemeh Nematollahi, Mark I. Stockman, S. Azar Oliaei Motlagh, Vadym Apalkov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-23T19:59:31Z","title":"Ultrafast optical currents in gapped graphene"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.09019","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":"sha256:14dec8780e944889bd2a127bcbe1f5e4934a3cc8063aa6a3de145ad803c90127","target":"record","created_at":"2026-07-04T23:59:36Z","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":"654b12a08f6ce188da575a0a69b0b575481c773d531dd90f7e058687c6b7fd14","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2019-08-23T19:59:31Z","title_canon_sha256":"87f6ba28ec909ee8d72d1f4ae3064bf3e148b1f4e92eea04bf97a217a487dbd5"},"schema_version":"1.0","source":{"id":"1908.09019","kind":"arxiv","version":1}},"canonical_sha256":"6baf1427b563ef1342648586456947f907fb121c1211dc4d5d0d1d808cab0cd5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6baf1427b563ef1342648586456947f907fb121c1211dc4d5d0d1d808cab0cd5","first_computed_at":"2026-07-04T23:59:36.115658Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:59:36.115658Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1NbJmM//yRh2IiT83cgfXwr9f/ZrKE2ZnDJ3x2o2rscBT6KX+KxkiAW8sTFB8ITAS0vPG4dHlHchhFGNptMsDQ==","signature_status":"signed_v1","signed_at":"2026-07-04T23:59:36.116075Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.09019","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:14dec8780e944889bd2a127bcbe1f5e4934a3cc8063aa6a3de145ad803c90127","sha256:35bf76223230bd8730c146f5a3ab8d1473987b1770e8404402fc6cc08b381de4"],"state_sha256":"dc41d810c1b59b06132cc9b6cffeb1bbd1dbbb949d73440f4aad823d5ed06272"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ef+1otJy4yPtZi/68U5dYvbEYu875IzRwyrzVFx/uz2RImh0aJ4yZ+QTpFIi73gqYvf4XhiYPCWseg9R6AMoBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-27T10:21:10.797421Z","bundle_sha256":"91051d4b6a0d627f1b2a31498b403328e57a8848700bf84be53b2e7288aab136"}}