{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:Z53SM5GV4HTLRGTDFU4DIBAR5V","short_pith_number":"pith:Z53SM5GV","schema_version":"1.0","canonical_sha256":"cf772674d5e1e6b89a632d38340411ed5bbfff27d16be050967e1f0c8bafd783","source":{"kind":"arxiv","id":"2507.14192","version":1},"attestation_state":"computed","paper":{"title":"E-21 Level Instability Frequency Dissemination over 2067 km noisy Telecommunication Infrastructure","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Cheng-Zhi Peng, Fa-Xi Chen, Fei Zhou, Hai-Feng Jiang, Jian-Wei Pan, Jian-Yu Guan, Jiu-Peng Chen, Kan Zhao, Lei Hou, Li-Bo Li, Qiang Zhang, Yang Xu","submitted_at":"2025-07-14T05:54:27Z","abstract_excerpt":"The realization of ultra stable optical frequency transmission through fiber networks is critical for advancing global optical frequency standards and enabling applications such as redefining the second in the International System of Units, geophysical sensing, quantum network construction, and fundamental physics experiments. However, achieving high reliability and low instability optical frequency carrier transmission links over distances exceeding thousands of kilometers remains technically challenging, thereby limiting the scalability and reliability of such networks. In this study, we exp"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2507.14192","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2025-07-14T05:54:27Z","cross_cats_sorted":[],"title_canon_sha256":"74f04e2e3eb961eae812386a52f12f8ecf435ea5017cc993e2cec232e95a208f","abstract_canon_sha256":"b50574c9dbb77d5bd8d38e918bd850e6a104ba31b66af1a13b3f261339777641"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-24T01:14:21.288719Z","signature_b64":"eYoZpmQy2EcV29+KrXee7PxoMzXnCRamnlvIw0T8WZHC1+HdqfKY85Wfyy8UD4MMZ6EVNBJspsj9z1OZt2EFDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cf772674d5e1e6b89a632d38340411ed5bbfff27d16be050967e1f0c8bafd783","last_reissued_at":"2026-06-24T01:14:21.288273Z","signature_status":"signed_v1","first_computed_at":"2026-06-24T01:14:21.288273Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"E-21 Level Instability Frequency Dissemination over 2067 km noisy Telecommunication Infrastructure","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Cheng-Zhi Peng, Fa-Xi Chen, Fei Zhou, Hai-Feng Jiang, Jian-Wei Pan, Jian-Yu Guan, Jiu-Peng Chen, Kan Zhao, Lei Hou, Li-Bo Li, Qiang Zhang, Yang Xu","submitted_at":"2025-07-14T05:54:27Z","abstract_excerpt":"The realization of ultra stable optical frequency transmission through fiber networks is critical for advancing global optical frequency standards and enabling applications such as redefining the second in the International System of Units, geophysical sensing, quantum network construction, and fundamental physics experiments. However, achieving high reliability and low instability optical frequency carrier transmission links over distances exceeding thousands of kilometers remains technically challenging, thereby limiting the scalability and reliability of such networks. In this study, we exp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.14192","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2507.14192/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2507.14192","created_at":"2026-06-24T01:14:21.288337+00:00"},{"alias_kind":"arxiv_version","alias_value":"2507.14192v1","created_at":"2026-06-24T01:14:21.288337+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.14192","created_at":"2026-06-24T01:14:21.288337+00:00"},{"alias_kind":"pith_short_12","alias_value":"Z53SM5GV4HTL","created_at":"2026-06-24T01:14:21.288337+00:00"},{"alias_kind":"pith_short_16","alias_value":"Z53SM5GV4HTLRGTD","created_at":"2026-06-24T01:14:21.288337+00:00"},{"alias_kind":"pith_short_8","alias_value":"Z53SM5GV","created_at":"2026-06-24T01:14:21.288337+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2605.05642","citing_title":"Hollow-Core Fiber for Long-Span Optical Frequency Transfer: Improved Instability and Extended Single-Span Reach","ref_index":24,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/Z53SM5GV4HTLRGTDFU4DIBAR5V","json":"https://pith.science/pith/Z53SM5GV4HTLRGTDFU4DIBAR5V.json","graph_json":"https://pith.science/api/pith-number/Z53SM5GV4HTLRGTDFU4DIBAR5V/graph.json","events_json":"https://pith.science/api/pith-number/Z53SM5GV4HTLRGTDFU4DIBAR5V/events.json","paper":"https://pith.science/paper/Z53SM5GV"},"agent_actions":{"view_html":"https://pith.science/pith/Z53SM5GV4HTLRGTDFU4DIBAR5V","download_json":"https://pith.science/pith/Z53SM5GV4HTLRGTDFU4DIBAR5V.json","view_paper":"https://pith.science/paper/Z53SM5GV","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2507.14192&json=true","fetch_graph":"https://pith.science/api/pith-number/Z53SM5GV4HTLRGTDFU4DIBAR5V/graph.json","fetch_events":"https://pith.science/api/pith-number/Z53SM5GV4HTLRGTDFU4DIBAR5V/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/Z53SM5GV4HTLRGTDFU4DIBAR5V/action/timestamp_anchor","attest_storage":"https://pith.science/pith/Z53SM5GV4HTLRGTDFU4DIBAR5V/action/storage_attestation","attest_author":"https://pith.science/pith/Z53SM5GV4HTLRGTDFU4DIBAR5V/action/author_attestation","sign_citation":"https://pith.science/pith/Z53SM5GV4HTLRGTDFU4DIBAR5V/action/citation_signature","submit_replication":"https://pith.science/pith/Z53SM5GV4HTLRGTDFU4DIBAR5V/action/replication_record"}},"created_at":"2026-06-24T01:14:21.288337+00:00","updated_at":"2026-06-24T01:14:21.288337+00:00"}