{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:IGDB3PRY5UDDLLRSERJKDZLJQZ","short_pith_number":"pith:IGDB3PRY","canonical_record":{"source":{"id":"1906.00104","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-05-31T22:15:15Z","cross_cats_sorted":[],"title_canon_sha256":"442962474bcfdb7dec5af25c68085c1f57e14c65793fcd8fb665999679eedd05","abstract_canon_sha256":"0493dea59308aee2647b58ada13f976b6eaea3078c8f6d4c3deb8ad238f7ce3a"},"schema_version":"1.0"},"canonical_sha256":"41861dbe38ed0635ae322452a1e5698672328a74ff05f04cebdef40d4193532c","source":{"kind":"arxiv","id":"1906.00104","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.00104","created_at":"2026-05-17T23:44:02Z"},{"alias_kind":"arxiv_version","alias_value":"1906.00104v2","created_at":"2026-05-17T23:44:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.00104","created_at":"2026-05-17T23:44:02Z"},{"alias_kind":"pith_short_12","alias_value":"IGDB3PRY5UDD","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"IGDB3PRY5UDDLLRS","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"IGDB3PRY","created_at":"2026-05-18T12:33:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:IGDB3PRY5UDDLLRSERJKDZLJQZ","target":"record","payload":{"canonical_record":{"source":{"id":"1906.00104","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-05-31T22:15:15Z","cross_cats_sorted":[],"title_canon_sha256":"442962474bcfdb7dec5af25c68085c1f57e14c65793fcd8fb665999679eedd05","abstract_canon_sha256":"0493dea59308aee2647b58ada13f976b6eaea3078c8f6d4c3deb8ad238f7ce3a"},"schema_version":"1.0"},"canonical_sha256":"41861dbe38ed0635ae322452a1e5698672328a74ff05f04cebdef40d4193532c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:44:02.060552Z","signature_b64":"x9m6JWBaKEICh0Mf55wAEFVB+XXFQmtfO1KDwhFqB1t32UegHR1nyRqefQaNVYdp9mBJ+EN+JTPNHMEdBen6Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"41861dbe38ed0635ae322452a1e5698672328a74ff05f04cebdef40d4193532c","last_reissued_at":"2026-05-17T23:44:02.060014Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:44:02.060014Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.00104","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":"2026-05-17T23:44:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SKzwWKaS6oK3DtWeOjXUFY4uh4nJgVJlgwbiOmNPLg114Jthsgtu0MBxK19xRuDOj7y1u6uNnTynqxXhGrgHCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T21:19:25.661799Z"},"content_sha256":"ca6ddaf60ded8f55927786ab1d3b76dcd3c19afddd7336f7d0e34b195c0e4617","schema_version":"1.0","event_id":"sha256:ca6ddaf60ded8f55927786ab1d3b76dcd3c19afddd7336f7d0e34b195c0e4617"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:IGDB3PRY5UDDLLRSERJKDZLJQZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultranarrow linewidth photonic-atomic laser","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"David Carlson, Douglas Bopp, John Kitching, Liron Stern, Scott B. Papp, Songbai Kang, Wei Zhang, Zachary Newman","submitted_at":"2019-05-31T22:15:15Z","abstract_excerpt":"Lasers with high spectral purity can enable a diverse application space, including precision spectroscopy, coherent high-speed communications, physical sensing, and manipulation of quantum systems. Already, meticulous design and construction of bench Fabry-Perot cavities has made possible dramatic achievements in active laser-linewidth reduction, predominantly for optical-atomic clocks. Yet there is increasing demand for miniaturized laser systems operating with high performance in ambient environments. Here, we report a compact and robust photonic-atomic laser comprising a 2.5 cm long, 20,000"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.00104","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":"2026-05-17T23:44:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DYg2bmG7OGlciCE0KNf8UpAceSiesRcnOwIvb4Ysp8v7dCbwIktCIOZ1/VuvqrCZHX/L+AMN8iGAFZVAsMJTBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T21:19:25.662214Z"},"content_sha256":"5f96c5812626170653ff596360262523e21f752e1777e0df5ae504195e1bbbf4","schema_version":"1.0","event_id":"sha256:5f96c5812626170653ff596360262523e21f752e1777e0df5ae504195e1bbbf4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IGDB3PRY5UDDLLRSERJKDZLJQZ/bundle.json","state_url":"https://pith.science/pith/IGDB3PRY5UDDLLRSERJKDZLJQZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IGDB3PRY5UDDLLRSERJKDZLJQZ/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":"2026-05-24T21:19:25Z","links":{"resolver":"https://pith.science/pith/IGDB3PRY5UDDLLRSERJKDZLJQZ","bundle":"https://pith.science/pith/IGDB3PRY5UDDLLRSERJKDZLJQZ/bundle.json","state":"https://pith.science/pith/IGDB3PRY5UDDLLRSERJKDZLJQZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IGDB3PRY5UDDLLRSERJKDZLJQZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:IGDB3PRY5UDDLLRSERJKDZLJQZ","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":"0493dea59308aee2647b58ada13f976b6eaea3078c8f6d4c3deb8ad238f7ce3a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-05-31T22:15:15Z","title_canon_sha256":"442962474bcfdb7dec5af25c68085c1f57e14c65793fcd8fb665999679eedd05"},"schema_version":"1.0","source":{"id":"1906.00104","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.00104","created_at":"2026-05-17T23:44:02Z"},{"alias_kind":"arxiv_version","alias_value":"1906.00104v2","created_at":"2026-05-17T23:44:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.00104","created_at":"2026-05-17T23:44:02Z"},{"alias_kind":"pith_short_12","alias_value":"IGDB3PRY5UDD","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"IGDB3PRY5UDDLLRS","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"IGDB3PRY","created_at":"2026-05-18T12:33:18Z"}],"graph_snapshots":[{"event_id":"sha256:5f96c5812626170653ff596360262523e21f752e1777e0df5ae504195e1bbbf4","target":"graph","created_at":"2026-05-17T23:44:02Z","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":"Lasers with high spectral purity can enable a diverse application space, including precision spectroscopy, coherent high-speed communications, physical sensing, and manipulation of quantum systems. Already, meticulous design and construction of bench Fabry-Perot cavities has made possible dramatic achievements in active laser-linewidth reduction, predominantly for optical-atomic clocks. Yet there is increasing demand for miniaturized laser systems operating with high performance in ambient environments. Here, we report a compact and robust photonic-atomic laser comprising a 2.5 cm long, 20,000","authors_text":"David Carlson, Douglas Bopp, John Kitching, Liron Stern, Scott B. Papp, Songbai Kang, Wei Zhang, Zachary Newman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-05-31T22:15:15Z","title":"Ultranarrow linewidth photonic-atomic laser"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.00104","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:ca6ddaf60ded8f55927786ab1d3b76dcd3c19afddd7336f7d0e34b195c0e4617","target":"record","created_at":"2026-05-17T23:44:02Z","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":"0493dea59308aee2647b58ada13f976b6eaea3078c8f6d4c3deb8ad238f7ce3a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-05-31T22:15:15Z","title_canon_sha256":"442962474bcfdb7dec5af25c68085c1f57e14c65793fcd8fb665999679eedd05"},"schema_version":"1.0","source":{"id":"1906.00104","kind":"arxiv","version":2}},"canonical_sha256":"41861dbe38ed0635ae322452a1e5698672328a74ff05f04cebdef40d4193532c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"41861dbe38ed0635ae322452a1e5698672328a74ff05f04cebdef40d4193532c","first_computed_at":"2026-05-17T23:44:02.060014Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:44:02.060014Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"x9m6JWBaKEICh0Mf55wAEFVB+XXFQmtfO1KDwhFqB1t32UegHR1nyRqefQaNVYdp9mBJ+EN+JTPNHMEdBen6Ag==","signature_status":"signed_v1","signed_at":"2026-05-17T23:44:02.060552Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.00104","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ca6ddaf60ded8f55927786ab1d3b76dcd3c19afddd7336f7d0e34b195c0e4617","sha256:5f96c5812626170653ff596360262523e21f752e1777e0df5ae504195e1bbbf4"],"state_sha256":"9edfa6aaea87b5fd48032a796523492cc7cef1c9e71927aa6b3afb8c73e282bd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K0pD6IsIZYQuJ+/vgl03mKJGaW7JBZE9zZffdz2JiM9TE5a5xSO0Z1NAhxYkfHE22bLW5wfCEJrtxZxjn/S8Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T21:19:25.665278Z","bundle_sha256":"b39d2c65d40ca94b0d53f8f1125cfd45414ab24aec058019806732ba72db20ec"}}