{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:C7UG6W3F5B3C6YRXSVB7D6TJT7","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":"855ffcb021cd555d3067c0ba976105ebf5086da271c49134a90707e0f0cddfa9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-04-29T08:36:17Z","title_canon_sha256":"b95f841b6e565b51c2604d7065a7703a1872500aaa03578f40a32d5ffae5aba7"},"schema_version":"1.0","source":{"id":"1204.6463","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.6463","created_at":"2026-05-18T03:36:16Z"},{"alias_kind":"arxiv_version","alias_value":"1204.6463v1","created_at":"2026-05-18T03:36:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.6463","created_at":"2026-05-18T03:36:16Z"},{"alias_kind":"pith_short_12","alias_value":"C7UG6W3F5B3C","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"C7UG6W3F5B3C6YRX","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"C7UG6W3F","created_at":"2026-05-18T12:27:01Z"}],"graph_snapshots":[{"event_id":"sha256:d3188b063788d6128efe9002eb1e28b754f14cdbaa54fdb9bc118ba79bc16365","target":"graph","created_at":"2026-05-18T03:36:16Z","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"},"paper":{"abstract_excerpt":"We use time-resolved optical reflectivity to study the laser stimulated dynamics in the magnetic shape memory alloy Ni_2MnGa. We observe two coherent optical phonons, at 1.2 THz in the martensite phase and at 0.7 THz in the pre-martensite phase, which we interpret as a zone-folded acoustic phonon and a heavily damped amplitudon respectively. In the martensite phase the martensitic phase transition can be induced by a fs laser pulse on a timescale of a few ps.","authors_text":"A. Caviezel, C. Quitmann, G. Ingold, P. Beaud, S. O. Mariager","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-04-29T08:36:17Z","title":"Coherent phonon dynamics at the martensitic phase transition of Ni_2MnGa"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.6463","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":"sha256:8ea2dc73af88a43ce03dfb01cf91fb016271faf67736468cd246c11f9e0f38b5","target":"record","created_at":"2026-05-18T03:36:16Z","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":"855ffcb021cd555d3067c0ba976105ebf5086da271c49134a90707e0f0cddfa9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-04-29T08:36:17Z","title_canon_sha256":"b95f841b6e565b51c2604d7065a7703a1872500aaa03578f40a32d5ffae5aba7"},"schema_version":"1.0","source":{"id":"1204.6463","kind":"arxiv","version":1}},"canonical_sha256":"17e86f5b65e8762f62379543f1fa699ffb567768ff94b290c07a8cef5d4ad974","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"17e86f5b65e8762f62379543f1fa699ffb567768ff94b290c07a8cef5d4ad974","first_computed_at":"2026-05-18T03:36:16.032243Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:36:16.032243Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3GTkJk3t35/tgOsUYJdr5Wuap3D7EPHtJySOPO49K5Feq0nc+ioxfM5gswiDFQ4+HhNVkaczHARB34AvfT4ZBw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:36:16.032902Z","signed_message":"canonical_sha256_bytes"},"source_id":"1204.6463","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8ea2dc73af88a43ce03dfb01cf91fb016271faf67736468cd246c11f9e0f38b5","sha256:d3188b063788d6128efe9002eb1e28b754f14cdbaa54fdb9bc118ba79bc16365"],"state_sha256":"31791d17824b6f84af609abcbe2d0499af8ec75b73255e22328a99d77f672ec1"}