{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:FAOFMHTSDHQMIZSXTIDUDXHMDO","short_pith_number":"pith:FAOFMHTS","canonical_record":{"source":{"id":"1905.00647","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2019-05-02T09:54:55Z","cross_cats_sorted":[],"title_canon_sha256":"d42aa25da7c145d613bf35badd0afe880dbf66e44eb5f85961f49bcf682b8843","abstract_canon_sha256":"c5325e723cb0d318823081a7b906ed0e0bb14051da88a149909c756321a6eeb5"},"schema_version":"1.0"},"canonical_sha256":"281c561e7219e0c466579a0741dcec1b85ffeebd81b92d7bc3c70dfcd07db538","source":{"kind":"arxiv","id":"1905.00647","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.00647","created_at":"2026-05-17T23:47:11Z"},{"alias_kind":"arxiv_version","alias_value":"1905.00647v1","created_at":"2026-05-17T23:47:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.00647","created_at":"2026-05-17T23:47:11Z"},{"alias_kind":"pith_short_12","alias_value":"FAOFMHTSDHQM","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"FAOFMHTSDHQMIZSX","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"FAOFMHTS","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:FAOFMHTSDHQMIZSXTIDUDXHMDO","target":"record","payload":{"canonical_record":{"source":{"id":"1905.00647","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2019-05-02T09:54:55Z","cross_cats_sorted":[],"title_canon_sha256":"d42aa25da7c145d613bf35badd0afe880dbf66e44eb5f85961f49bcf682b8843","abstract_canon_sha256":"c5325e723cb0d318823081a7b906ed0e0bb14051da88a149909c756321a6eeb5"},"schema_version":"1.0"},"canonical_sha256":"281c561e7219e0c466579a0741dcec1b85ffeebd81b92d7bc3c70dfcd07db538","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:47:11.332617Z","signature_b64":"IZvkQ6d91wsD4PdAcanWdFMcqLvrqs2QENrYT1w4GFv/tKqby+PlC6fGtzzfq972hZBma5rPXcb817q3OVkmBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"281c561e7219e0c466579a0741dcec1b85ffeebd81b92d7bc3c70dfcd07db538","last_reissued_at":"2026-05-17T23:47:11.332066Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:47:11.332066Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.00647","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":"2026-05-17T23:47:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BuVv0R0zfnwQKcl8QXd4Hjb6klcDJ73T/uHbOHXQwuDFUpVKWWW0NBes8hPoOzhqIH3mt565NbshGdKkWGZ6Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T02:11:47.699433Z"},"content_sha256":"5944dbcc471c47b75a6db4bf0d16340c1b17a1cd9f706d2dcbed63de29eaf7eb","schema_version":"1.0","event_id":"sha256:5944dbcc471c47b75a6db4bf0d16340c1b17a1cd9f706d2dcbed63de29eaf7eb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:FAOFMHTSDHQMIZSXTIDUDXHMDO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Room-Temperature Continuous-Wave Frequency-Referenced Spectrometer up to 7.5 THz","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Davide Calonico, Luigi Consolino, Marco Ravaro, Michele De Regis, Paolo De Natale, Saverio Bartalini","submitted_at":"2019-05-02T09:54:55Z","abstract_excerpt":"The lack of coherent room-temperature sources in the whole terahertz spectral window (0.3-10 THz) has significantly hampered the growth of scientific and technological applications in this range. Among them, high-precision frequency measurements of molecular transitions play a central role but remain an open challenge. Here, room-temperature generation and detection of continuous-wave, broadly tunable, narrow-linewidth THz radiation are presented, and their application to high-resolution spectroscopy in the broad 1-7.5 THz spectral range is demonstrated. This result has been achieved by implem"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.00647","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":"2026-05-17T23:47:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NZPdFx0w+8UZ16thenJkGbYjkwaN+FFPzHdS20nhvijsTiCB/nJCw5kW44AFAewQGHbFKPuJ0Ixln+2zfewTCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T02:11:47.700100Z"},"content_sha256":"06c15f1ee258ec2042caf5f04a4d4813b65cc67cba35009d22a1c1b32e8263c4","schema_version":"1.0","event_id":"sha256:06c15f1ee258ec2042caf5f04a4d4813b65cc67cba35009d22a1c1b32e8263c4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FAOFMHTSDHQMIZSXTIDUDXHMDO/bundle.json","state_url":"https://pith.science/pith/FAOFMHTSDHQMIZSXTIDUDXHMDO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FAOFMHTSDHQMIZSXTIDUDXHMDO/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":"2026-05-27T02:11:47Z","links":{"resolver":"https://pith.science/pith/FAOFMHTSDHQMIZSXTIDUDXHMDO","bundle":"https://pith.science/pith/FAOFMHTSDHQMIZSXTIDUDXHMDO/bundle.json","state":"https://pith.science/pith/FAOFMHTSDHQMIZSXTIDUDXHMDO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FAOFMHTSDHQMIZSXTIDUDXHMDO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:FAOFMHTSDHQMIZSXTIDUDXHMDO","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":"c5325e723cb0d318823081a7b906ed0e0bb14051da88a149909c756321a6eeb5","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2019-05-02T09:54:55Z","title_canon_sha256":"d42aa25da7c145d613bf35badd0afe880dbf66e44eb5f85961f49bcf682b8843"},"schema_version":"1.0","source":{"id":"1905.00647","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.00647","created_at":"2026-05-17T23:47:11Z"},{"alias_kind":"arxiv_version","alias_value":"1905.00647v1","created_at":"2026-05-17T23:47:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.00647","created_at":"2026-05-17T23:47:11Z"},{"alias_kind":"pith_short_12","alias_value":"FAOFMHTSDHQM","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"FAOFMHTSDHQMIZSX","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"FAOFMHTS","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:06c15f1ee258ec2042caf5f04a4d4813b65cc67cba35009d22a1c1b32e8263c4","target":"graph","created_at":"2026-05-17T23:47:11Z","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":"The lack of coherent room-temperature sources in the whole terahertz spectral window (0.3-10 THz) has significantly hampered the growth of scientific and technological applications in this range. Among them, high-precision frequency measurements of molecular transitions play a central role but remain an open challenge. Here, room-temperature generation and detection of continuous-wave, broadly tunable, narrow-linewidth THz radiation are presented, and their application to high-resolution spectroscopy in the broad 1-7.5 THz spectral range is demonstrated. This result has been achieved by implem","authors_text":"Davide Calonico, Luigi Consolino, Marco Ravaro, Michele De Regis, Paolo De Natale, Saverio Bartalini","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2019-05-02T09:54:55Z","title":"Room-Temperature Continuous-Wave Frequency-Referenced Spectrometer up to 7.5 THz"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.00647","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":"sha256:5944dbcc471c47b75a6db4bf0d16340c1b17a1cd9f706d2dcbed63de29eaf7eb","target":"record","created_at":"2026-05-17T23:47:11Z","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":"c5325e723cb0d318823081a7b906ed0e0bb14051da88a149909c756321a6eeb5","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2019-05-02T09:54:55Z","title_canon_sha256":"d42aa25da7c145d613bf35badd0afe880dbf66e44eb5f85961f49bcf682b8843"},"schema_version":"1.0","source":{"id":"1905.00647","kind":"arxiv","version":1}},"canonical_sha256":"281c561e7219e0c466579a0741dcec1b85ffeebd81b92d7bc3c70dfcd07db538","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"281c561e7219e0c466579a0741dcec1b85ffeebd81b92d7bc3c70dfcd07db538","first_computed_at":"2026-05-17T23:47:11.332066Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:47:11.332066Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IZvkQ6d91wsD4PdAcanWdFMcqLvrqs2QENrYT1w4GFv/tKqby+PlC6fGtzzfq972hZBma5rPXcb817q3OVkmBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:47:11.332617Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.00647","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5944dbcc471c47b75a6db4bf0d16340c1b17a1cd9f706d2dcbed63de29eaf7eb","sha256:06c15f1ee258ec2042caf5f04a4d4813b65cc67cba35009d22a1c1b32e8263c4"],"state_sha256":"c1c0364ffe26ab1a952294e7af54b3d9da5c13086b7fdfce04da18fcbdb17015"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f3Ju6VyqjTzL28bDgakXxCMWKtmxu0YUmQ/69teIlgHCZJh0KzxscGIh0CrWTz6A/5+l50dFmrjIBCcpnIRQAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T02:11:47.703611Z","bundle_sha256":"c8a1676e1780e84bea8db856ec1e3442a5caf65e6c0784e5bf39a45eb873ee4a"}}