{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:4EWFLLAEWCYSIQ4ONQGNBXEXLC","short_pith_number":"pith:4EWFLLAE","canonical_record":{"source":{"id":"1303.5643","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-03-22T15:27:15Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"d8a34a2deb81d4f2f9510ef3b3dc63bfa9d2637bda965654b0962e91517665d1","abstract_canon_sha256":"7ccb8a27de61f0b84320f7b2b0c396f09f86a1805be3e044c6f8ab659deee4dd"},"schema_version":"1.0"},"canonical_sha256":"e12c55ac04b0b124438e6c0cd0dc97588b50e6fb18ce748c224218e17322fd2c","source":{"kind":"arxiv","id":"1303.5643","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.5643","created_at":"2026-05-18T03:21:45Z"},{"alias_kind":"arxiv_version","alias_value":"1303.5643v1","created_at":"2026-05-18T03:21:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.5643","created_at":"2026-05-18T03:21:45Z"},{"alias_kind":"pith_short_12","alias_value":"4EWFLLAEWCYS","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"4EWFLLAEWCYSIQ4O","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"4EWFLLAE","created_at":"2026-05-18T12:27:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:4EWFLLAEWCYSIQ4ONQGNBXEXLC","target":"record","payload":{"canonical_record":{"source":{"id":"1303.5643","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-03-22T15:27:15Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"d8a34a2deb81d4f2f9510ef3b3dc63bfa9d2637bda965654b0962e91517665d1","abstract_canon_sha256":"7ccb8a27de61f0b84320f7b2b0c396f09f86a1805be3e044c6f8ab659deee4dd"},"schema_version":"1.0"},"canonical_sha256":"e12c55ac04b0b124438e6c0cd0dc97588b50e6fb18ce748c224218e17322fd2c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:21:45.164928Z","signature_b64":"K8T5x6ZN+0jX1mt1AYNF43r6nTbBFF1+puaRqcbVBvUuKbmOIQYoE6nWOtRWiCp7Ed56sRDzGtk8Ybm3OpimBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e12c55ac04b0b124438e6c0cd0dc97588b50e6fb18ce748c224218e17322fd2c","last_reissued_at":"2026-05-18T03:21:45.164206Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:21:45.164206Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1303.5643","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":"2026-05-18T03:21:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xxEoZNy8Pr4Ic6w6CIDULn50rtqo3/lRvPhv8jaHkDk057sG2JgQCS9HHiyQ9oFBqqiilD5OyAYKmy8uVZxFAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T11:12:55.580078Z"},"content_sha256":"6da593d39b4cc8e2acf38d9aaac216a19791cb19ef1a3826324d2c4d03683a0b","schema_version":"1.0","event_id":"sha256:6da593d39b4cc8e2acf38d9aaac216a19791cb19ef1a3826324d2c4d03683a0b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:4EWFLLAEWCYSIQ4ONQGNBXEXLC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Direct time domain sampling of sub-THz coherent acoustic phonon spectra in SrTiO$_3$ using ultrafast X-ray diffraction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Andr\\'e Bojahr, Daniel Schick, Hengameh Navirian, Ionela Vrejoiu, Jevgenij Goldshteyn, Marc Herzog, Mathias Sander, Matias Bargheer, Peter Gaal, Roman Shayduk, Wolfram Leitenberger","submitted_at":"2013-03-22T15:27:15Z","abstract_excerpt":"We synthesize sub-THz longitudinal quasi-monochromatic acoustic phonons in a SrTiO$_3$ single crystal using a SrRuO$_3$/SrTiO$_3$ superlattice as an optical-acoustic transducer. The generated acoustic phonon spectrum is determined using ultrafast X-ray diffraction. The analysis of the generated phonon spectrum in the time domain reveals a k-vector dependent phonon lifetime. It is observed that even at sub-THz frequencies the phonon lifetime agrees with the 1/$\\omega^2$ power law known from Akhiezer's model for hyper sound attenuation. The observed shift of the synthesized spectrum to the highe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.5643","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":"2026-05-18T03:21:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aavjy0X8DlNObGba+ZSOO7pUf6JPf4dxV0lS0hEHiBKWowJJijUdMiIiht8wm7shl3nBVHV8pNxdOFkW1gtOAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T11:12:55.580451Z"},"content_sha256":"4d3450129acaa6ada9a710526518d27174d76062254de757d705409752a8091b","schema_version":"1.0","event_id":"sha256:4d3450129acaa6ada9a710526518d27174d76062254de757d705409752a8091b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4EWFLLAEWCYSIQ4ONQGNBXEXLC/bundle.json","state_url":"https://pith.science/pith/4EWFLLAEWCYSIQ4ONQGNBXEXLC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4EWFLLAEWCYSIQ4ONQGNBXEXLC/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":"2026-05-26T11:12:55Z","links":{"resolver":"https://pith.science/pith/4EWFLLAEWCYSIQ4ONQGNBXEXLC","bundle":"https://pith.science/pith/4EWFLLAEWCYSIQ4ONQGNBXEXLC/bundle.json","state":"https://pith.science/pith/4EWFLLAEWCYSIQ4ONQGNBXEXLC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4EWFLLAEWCYSIQ4ONQGNBXEXLC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:4EWFLLAEWCYSIQ4ONQGNBXEXLC","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":"7ccb8a27de61f0b84320f7b2b0c396f09f86a1805be3e044c6f8ab659deee4dd","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-03-22T15:27:15Z","title_canon_sha256":"d8a34a2deb81d4f2f9510ef3b3dc63bfa9d2637bda965654b0962e91517665d1"},"schema_version":"1.0","source":{"id":"1303.5643","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.5643","created_at":"2026-05-18T03:21:45Z"},{"alias_kind":"arxiv_version","alias_value":"1303.5643v1","created_at":"2026-05-18T03:21:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.5643","created_at":"2026-05-18T03:21:45Z"},{"alias_kind":"pith_short_12","alias_value":"4EWFLLAEWCYS","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"4EWFLLAEWCYSIQ4O","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"4EWFLLAE","created_at":"2026-05-18T12:27:32Z"}],"graph_snapshots":[{"event_id":"sha256:4d3450129acaa6ada9a710526518d27174d76062254de757d705409752a8091b","target":"graph","created_at":"2026-05-18T03:21:45Z","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 synthesize sub-THz longitudinal quasi-monochromatic acoustic phonons in a SrTiO$_3$ single crystal using a SrRuO$_3$/SrTiO$_3$ superlattice as an optical-acoustic transducer. The generated acoustic phonon spectrum is determined using ultrafast X-ray diffraction. The analysis of the generated phonon spectrum in the time domain reveals a k-vector dependent phonon lifetime. It is observed that even at sub-THz frequencies the phonon lifetime agrees with the 1/$\\omega^2$ power law known from Akhiezer's model for hyper sound attenuation. The observed shift of the synthesized spectrum to the highe","authors_text":"Andr\\'e Bojahr, Daniel Schick, Hengameh Navirian, Ionela Vrejoiu, Jevgenij Goldshteyn, Marc Herzog, Mathias Sander, Matias Bargheer, Peter Gaal, Roman Shayduk, Wolfram Leitenberger","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-03-22T15:27:15Z","title":"Direct time domain sampling of sub-THz coherent acoustic phonon spectra in SrTiO$_3$ using ultrafast X-ray diffraction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.5643","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":"sha256:6da593d39b4cc8e2acf38d9aaac216a19791cb19ef1a3826324d2c4d03683a0b","target":"record","created_at":"2026-05-18T03:21:45Z","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":"7ccb8a27de61f0b84320f7b2b0c396f09f86a1805be3e044c6f8ab659deee4dd","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-03-22T15:27:15Z","title_canon_sha256":"d8a34a2deb81d4f2f9510ef3b3dc63bfa9d2637bda965654b0962e91517665d1"},"schema_version":"1.0","source":{"id":"1303.5643","kind":"arxiv","version":1}},"canonical_sha256":"e12c55ac04b0b124438e6c0cd0dc97588b50e6fb18ce748c224218e17322fd2c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e12c55ac04b0b124438e6c0cd0dc97588b50e6fb18ce748c224218e17322fd2c","first_computed_at":"2026-05-18T03:21:45.164206Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:21:45.164206Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"K8T5x6ZN+0jX1mt1AYNF43r6nTbBFF1+puaRqcbVBvUuKbmOIQYoE6nWOtRWiCp7Ed56sRDzGtk8Ybm3OpimBA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:21:45.164928Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.5643","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6da593d39b4cc8e2acf38d9aaac216a19791cb19ef1a3826324d2c4d03683a0b","sha256:4d3450129acaa6ada9a710526518d27174d76062254de757d705409752a8091b"],"state_sha256":"47fe3725546b3cfbebcd1430ba0e140ade41300ae3609f78b2a27a5913d9dc8e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oXgqwMTS3ui/n4rElpzswJFqi3X4fPTchVOk979b66FjbM9M4Oa4zqgUf+M19JqhCYMfl6XLcsFyuEi3+uxHAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T11:12:55.582845Z","bundle_sha256":"5f3871b60293027b5ce8aec2aea5d56d5f6c119850c69cdea2a3db939ac78e0f"}}