{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:4GE7QJUYNDTALE3RCM2XDD3KXG","short_pith_number":"pith:4GE7QJUY","canonical_record":{"source":{"id":"2412.12557","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2024-12-17T05:31:46Z","cross_cats_sorted":["cond-mat.other","hep-ex","physics.app-ph","physics.optics"],"title_canon_sha256":"e51ae61e67e7e96440d190e5380074251d0d90d7c2a45efa63671279194e933f","abstract_canon_sha256":"d0179f432f1310254a4557c63051b200c476c4ab27748063d2856ff20c460478"},"schema_version":"1.0"},"canonical_sha256":"e189f8269868e60593711335718f6ab99607a6aac0987f9574a2b6a9dea339f3","source":{"kind":"arxiv","id":"2412.12557","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2412.12557","created_at":"2026-07-05T09:50:16Z"},{"alias_kind":"arxiv_version","alias_value":"2412.12557v1","created_at":"2026-07-05T09:50:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2412.12557","created_at":"2026-07-05T09:50:16Z"},{"alias_kind":"pith_short_12","alias_value":"4GE7QJUYNDTA","created_at":"2026-07-05T09:50:16Z"},{"alias_kind":"pith_short_16","alias_value":"4GE7QJUYNDTALE3R","created_at":"2026-07-05T09:50:16Z"},{"alias_kind":"pith_short_8","alias_value":"4GE7QJUY","created_at":"2026-07-05T09:50:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:4GE7QJUYNDTALE3RCM2XDD3KXG","target":"record","payload":{"canonical_record":{"source":{"id":"2412.12557","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2024-12-17T05:31:46Z","cross_cats_sorted":["cond-mat.other","hep-ex","physics.app-ph","physics.optics"],"title_canon_sha256":"e51ae61e67e7e96440d190e5380074251d0d90d7c2a45efa63671279194e933f","abstract_canon_sha256":"d0179f432f1310254a4557c63051b200c476c4ab27748063d2856ff20c460478"},"schema_version":"1.0"},"canonical_sha256":"e189f8269868e60593711335718f6ab99607a6aac0987f9574a2b6a9dea339f3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:50:16.982167Z","signature_b64":"yjsoJnKIHlWeSUATXwVUcnDPTsfbaQt6BPNlyOqbPiWRISQb+eg9YasDhAAtm8yB9XQ7Ta4J3dqfl9kw9ZiaBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e189f8269868e60593711335718f6ab99607a6aac0987f9574a2b6a9dea339f3","last_reissued_at":"2026-07-05T09:50:16.981704Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:50:16.981704Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2412.12557","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":"2026-07-05T09:50:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZlQqTUpNHtGt5UTBOLGCb6vKfrsBQ00oHQEV7rBvrCikpJB08tbBYY9gmW3xjbAu2IkaQwDG0bnbnckW1V+KDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-14T01:14:13.241966Z"},"content_sha256":"ff9c0e3edcc501a7c1ff587e800bb771226b71d1af27394e95947f3050adfc79","schema_version":"1.0","event_id":"sha256:ff9c0e3edcc501a7c1ff587e800bb771226b71d1af27394e95947f3050adfc79"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:4GE7QJUYNDTALE3RCM2XDD3KXG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultrafast demagnetization in ferromagnetic materials: Origins and progress","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.other","hep-ex","physics.app-ph","physics.optics"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Christian Greb, Claus M. Schneider, Daniel E. B\\\"urgler, Derang Cao, Fangzhou Wang, Jianbo Wang, Lining Pan, Meihong Liu, Qingfang Liu, Roman Adam, Sarah Heidtfeld, Xiaowen Chen, Zhenyan Lu","submitted_at":"2024-12-17T05:31:46Z","abstract_excerpt":"Since the discovery of ultrafast demagnetization in Ni thin films in 1996, laser-induced ultrafast spin dynamics have become a prominent research topic in the field of magnetism and spintronics. This development offers new possibilities for the advancement of spintronics and magnetic storage technology. The subject has drawn a substantial number of researchers, leading to a series of research endeavors. Various models have been proposed to elucidate the physical processes underlying laser-induced ultrafast spin dynamics in ferromagnetic materials. However, the potential origins of these proces"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2412.12557","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/2412.12557/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":"2026-07-05T09:50:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PRUq045oZ9QKhgB6pBgWtM6INBRANgHVn8mAOhMk1dwPrCdQIeRrdF2LnV5B4ROiXpN78pNTPJHY4NiXV3XXDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-14T01:14:13.242332Z"},"content_sha256":"ea4430bbc6afb76ee5f87c9baa3cd4ee6c22e0a4739675729c0cb250a93bb8da","schema_version":"1.0","event_id":"sha256:ea4430bbc6afb76ee5f87c9baa3cd4ee6c22e0a4739675729c0cb250a93bb8da"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4GE7QJUYNDTALE3RCM2XDD3KXG/bundle.json","state_url":"https://pith.science/pith/4GE7QJUYNDTALE3RCM2XDD3KXG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4GE7QJUYNDTALE3RCM2XDD3KXG/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":"2026-07-14T01:14:13Z","links":{"resolver":"https://pith.science/pith/4GE7QJUYNDTALE3RCM2XDD3KXG","bundle":"https://pith.science/pith/4GE7QJUYNDTALE3RCM2XDD3KXG/bundle.json","state":"https://pith.science/pith/4GE7QJUYNDTALE3RCM2XDD3KXG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4GE7QJUYNDTALE3RCM2XDD3KXG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:4GE7QJUYNDTALE3RCM2XDD3KXG","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":"d0179f432f1310254a4557c63051b200c476c4ab27748063d2856ff20c460478","cross_cats_sorted":["cond-mat.other","hep-ex","physics.app-ph","physics.optics"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2024-12-17T05:31:46Z","title_canon_sha256":"e51ae61e67e7e96440d190e5380074251d0d90d7c2a45efa63671279194e933f"},"schema_version":"1.0","source":{"id":"2412.12557","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2412.12557","created_at":"2026-07-05T09:50:16Z"},{"alias_kind":"arxiv_version","alias_value":"2412.12557v1","created_at":"2026-07-05T09:50:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2412.12557","created_at":"2026-07-05T09:50:16Z"},{"alias_kind":"pith_short_12","alias_value":"4GE7QJUYNDTA","created_at":"2026-07-05T09:50:16Z"},{"alias_kind":"pith_short_16","alias_value":"4GE7QJUYNDTALE3R","created_at":"2026-07-05T09:50:16Z"},{"alias_kind":"pith_short_8","alias_value":"4GE7QJUY","created_at":"2026-07-05T09:50:16Z"}],"graph_snapshots":[{"event_id":"sha256:ea4430bbc6afb76ee5f87c9baa3cd4ee6c22e0a4739675729c0cb250a93bb8da","target":"graph","created_at":"2026-07-05T09:50:16Z","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/2412.12557/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Since the discovery of ultrafast demagnetization in Ni thin films in 1996, laser-induced ultrafast spin dynamics have become a prominent research topic in the field of magnetism and spintronics. This development offers new possibilities for the advancement of spintronics and magnetic storage technology. The subject has drawn a substantial number of researchers, leading to a series of research endeavors. Various models have been proposed to elucidate the physical processes underlying laser-induced ultrafast spin dynamics in ferromagnetic materials. However, the potential origins of these proces","authors_text":"Christian Greb, Claus M. Schneider, Daniel E. B\\\"urgler, Derang Cao, Fangzhou Wang, Jianbo Wang, Lining Pan, Meihong Liu, Qingfang Liu, Roman Adam, Sarah Heidtfeld, Xiaowen Chen, Zhenyan Lu","cross_cats":["cond-mat.other","hep-ex","physics.app-ph","physics.optics"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2024-12-17T05:31:46Z","title":"Ultrafast demagnetization in ferromagnetic materials: Origins and progress"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2412.12557","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:ff9c0e3edcc501a7c1ff587e800bb771226b71d1af27394e95947f3050adfc79","target":"record","created_at":"2026-07-05T09:50:16Z","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":"d0179f432f1310254a4557c63051b200c476c4ab27748063d2856ff20c460478","cross_cats_sorted":["cond-mat.other","hep-ex","physics.app-ph","physics.optics"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2024-12-17T05:31:46Z","title_canon_sha256":"e51ae61e67e7e96440d190e5380074251d0d90d7c2a45efa63671279194e933f"},"schema_version":"1.0","source":{"id":"2412.12557","kind":"arxiv","version":1}},"canonical_sha256":"e189f8269868e60593711335718f6ab99607a6aac0987f9574a2b6a9dea339f3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e189f8269868e60593711335718f6ab99607a6aac0987f9574a2b6a9dea339f3","first_computed_at":"2026-07-05T09:50:16.981704Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:50:16.981704Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yjsoJnKIHlWeSUATXwVUcnDPTsfbaQt6BPNlyOqbPiWRISQb+eg9YasDhAAtm8yB9XQ7Ta4J3dqfl9kw9ZiaBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T09:50:16.982167Z","signed_message":"canonical_sha256_bytes"},"source_id":"2412.12557","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ff9c0e3edcc501a7c1ff587e800bb771226b71d1af27394e95947f3050adfc79","sha256:ea4430bbc6afb76ee5f87c9baa3cd4ee6c22e0a4739675729c0cb250a93bb8da"],"state_sha256":"3cfd9aa283818daab340263d026876935b165e133f43b58fc96cadd2f992852a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7GaaSeNw4rPcCEmk+kuaxY08UK2ejArWsa5N+/GxcR+fscaWXfPju9C+ta8JphaVgLgVHiDi5t0QBlhgl1X7Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-14T01:14:13.244363Z","bundle_sha256":"5f1de37189a1882ce4e6d974f47239381b8892da6a6ba092a226b140e9eda9b4"}}