{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:DHN6L5KG5ZGOQAZLSAKAZAPTHA","short_pith_number":"pith:DHN6L5KG","canonical_record":{"source":{"id":"1901.01013","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-01-04T08:12:20Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"e7d0fe58f57f47577d562d597983c05eb37c49ae7d24ffac1ade3abc78c04f85","abstract_canon_sha256":"8f0c8393a8b07bc59885a5b2529790a1ddaadc489a02afa59ced6b7a98affb89"},"schema_version":"1.0"},"canonical_sha256":"19dbe5f546ee4ce8032b90140c81f3383620835fe9a498866e382ebfdf884d7f","source":{"kind":"arxiv","id":"1901.01013","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.01013","created_at":"2026-05-17T23:43:03Z"},{"alias_kind":"arxiv_version","alias_value":"1901.01013v2","created_at":"2026-05-17T23:43:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.01013","created_at":"2026-05-17T23:43:03Z"},{"alias_kind":"pith_short_12","alias_value":"DHN6L5KG5ZGO","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"DHN6L5KG5ZGOQAZL","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"DHN6L5KG","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:DHN6L5KG5ZGOQAZLSAKAZAPTHA","target":"record","payload":{"canonical_record":{"source":{"id":"1901.01013","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-01-04T08:12:20Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"e7d0fe58f57f47577d562d597983c05eb37c49ae7d24ffac1ade3abc78c04f85","abstract_canon_sha256":"8f0c8393a8b07bc59885a5b2529790a1ddaadc489a02afa59ced6b7a98affb89"},"schema_version":"1.0"},"canonical_sha256":"19dbe5f546ee4ce8032b90140c81f3383620835fe9a498866e382ebfdf884d7f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:03.863387Z","signature_b64":"fqa+f/xaO45VcyXXcs9ZM0ayPJ62/1mRdIDSZY2dTuXmhj9X/LPIsqhXozoveT+4vixCWtRPSwOQv7VvWylKCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"19dbe5f546ee4ce8032b90140c81f3383620835fe9a498866e382ebfdf884d7f","last_reissued_at":"2026-05-17T23:43:03.862863Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:03.862863Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.01013","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:43:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s3eHND93BevHR9AAparLxwi2F9DoMOJbBgP1+xgLUExlupHjo3528HQcbdAHXg3uSxXSCDV5u2e3Mgqc0obvCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T10:00:04.388117Z"},"content_sha256":"953d0418db413eadf188a59f55dd2d04dc439a87fc2a4ff3d176d85caa20e909","schema_version":"1.0","event_id":"sha256:953d0418db413eadf188a59f55dd2d04dc439a87fc2a4ff3d176d85caa20e909"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:DHN6L5KG5ZGOQAZLSAKAZAPTHA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Imaging Gigahertz Zero-Group-Velocity Lamb Waves","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"physics.app-ph","authors_text":"J\\'er\\^ome Laurent, Motonobu Tomoda, Oliver B Wright, Osamu Matsuda, Paul H Otsuka, Qingnan Xie, Sylvain Mezil, Zhonghua Shen","submitted_at":"2019-01-04T08:12:20Z","abstract_excerpt":"We image GHz zero-group-velocity (ZGV) Lamb waves in the time domain by means of an ultrafast optical technique, revealing their stationary nature and their acoustic energy localization in two dimensions. The acoustic field is imaged to micron resolution on a nanoscale bilayer consisting of a silicon-nitride plate coated with a titanium film. Temporal and spatiotemporal Fourier transforms combined with a technique involving the intensity modulation of the optical pump and probe beams gives access to arbitrary acoustic frequencies, allowing ZGV modes to be isolated. The dispersion curves of the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.01013","kind":"arxiv","version":2},"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":"2026-05-17T23:43:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UU0FqyU93Dp8LqtrM0jZsV0xIa9qVJzRbTAJk28TrEZf2C98QZsZgPtm2mQuPhPzsIMrIrPDISPj30k02d7hAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T10:00:04.388575Z"},"content_sha256":"6b19ad2125444664a48829e48f706f744cf5d791694fd1ef2da7f067350273a1","schema_version":"1.0","event_id":"sha256:6b19ad2125444664a48829e48f706f744cf5d791694fd1ef2da7f067350273a1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DHN6L5KG5ZGOQAZLSAKAZAPTHA/bundle.json","state_url":"https://pith.science/pith/DHN6L5KG5ZGOQAZLSAKAZAPTHA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DHN6L5KG5ZGOQAZLSAKAZAPTHA/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":"2026-05-22T10:00:04Z","links":{"resolver":"https://pith.science/pith/DHN6L5KG5ZGOQAZLSAKAZAPTHA","bundle":"https://pith.science/pith/DHN6L5KG5ZGOQAZLSAKAZAPTHA/bundle.json","state":"https://pith.science/pith/DHN6L5KG5ZGOQAZLSAKAZAPTHA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DHN6L5KG5ZGOQAZLSAKAZAPTHA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:DHN6L5KG5ZGOQAZLSAKAZAPTHA","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":"8f0c8393a8b07bc59885a5b2529790a1ddaadc489a02afa59ced6b7a98affb89","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-01-04T08:12:20Z","title_canon_sha256":"e7d0fe58f57f47577d562d597983c05eb37c49ae7d24ffac1ade3abc78c04f85"},"schema_version":"1.0","source":{"id":"1901.01013","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.01013","created_at":"2026-05-17T23:43:03Z"},{"alias_kind":"arxiv_version","alias_value":"1901.01013v2","created_at":"2026-05-17T23:43:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.01013","created_at":"2026-05-17T23:43:03Z"},{"alias_kind":"pith_short_12","alias_value":"DHN6L5KG5ZGO","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"DHN6L5KG5ZGOQAZL","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"DHN6L5KG","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:6b19ad2125444664a48829e48f706f744cf5d791694fd1ef2da7f067350273a1","target":"graph","created_at":"2026-05-17T23:43:03Z","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 image GHz zero-group-velocity (ZGV) Lamb waves in the time domain by means of an ultrafast optical technique, revealing their stationary nature and their acoustic energy localization in two dimensions. The acoustic field is imaged to micron resolution on a nanoscale bilayer consisting of a silicon-nitride plate coated with a titanium film. Temporal and spatiotemporal Fourier transforms combined with a technique involving the intensity modulation of the optical pump and probe beams gives access to arbitrary acoustic frequencies, allowing ZGV modes to be isolated. The dispersion curves of the","authors_text":"J\\'er\\^ome Laurent, Motonobu Tomoda, Oliver B Wright, Osamu Matsuda, Paul H Otsuka, Qingnan Xie, Sylvain Mezil, Zhonghua Shen","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-01-04T08:12:20Z","title":"Imaging Gigahertz Zero-Group-Velocity Lamb Waves"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.01013","kind":"arxiv","version":2},"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":"sha256:953d0418db413eadf188a59f55dd2d04dc439a87fc2a4ff3d176d85caa20e909","target":"record","created_at":"2026-05-17T23:43:03Z","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":"8f0c8393a8b07bc59885a5b2529790a1ddaadc489a02afa59ced6b7a98affb89","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-01-04T08:12:20Z","title_canon_sha256":"e7d0fe58f57f47577d562d597983c05eb37c49ae7d24ffac1ade3abc78c04f85"},"schema_version":"1.0","source":{"id":"1901.01013","kind":"arxiv","version":2}},"canonical_sha256":"19dbe5f546ee4ce8032b90140c81f3383620835fe9a498866e382ebfdf884d7f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"19dbe5f546ee4ce8032b90140c81f3383620835fe9a498866e382ebfdf884d7f","first_computed_at":"2026-05-17T23:43:03.862863Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:03.862863Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fqa+f/xaO45VcyXXcs9ZM0ayPJ62/1mRdIDSZY2dTuXmhj9X/LPIsqhXozoveT+4vixCWtRPSwOQv7VvWylKCA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:03.863387Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.01013","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:953d0418db413eadf188a59f55dd2d04dc439a87fc2a4ff3d176d85caa20e909","sha256:6b19ad2125444664a48829e48f706f744cf5d791694fd1ef2da7f067350273a1"],"state_sha256":"ca5714dfaed767f66ce717e8b9921d7dfdce9f307812c23a66f98df67b9915b9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J1R+7viSzacV8MBvkdi8iCOqRnEioeiNw1Is4NI379aihgoX3pMuzaZ7kJJ66B47v+sz/OKbz6ubEesL5945CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T10:00:04.392063Z","bundle_sha256":"1d0b1b539c9b73e250b6fde4eca29bbced522b3e5c42389191dc55151ee182d3"}}