{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:LOJXT43JNBH3V4XJVQOOQ4MOGW","short_pith_number":"pith:LOJXT43J","schema_version":"1.0","canonical_sha256":"5b9379f369684fbaf2e9ac1ce8718e35ad20c5d7999e7c962cb27f75e00cf835","source":{"kind":"arxiv","id":"2505.06007","version":1},"attestation_state":"computed","paper":{"title":"Quantum Noise Limited Temperature-Change Estimation for Phase-OTDR Employing Coherent Detection","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Darko Zibar, Francesco Da Ros, Huwei Wang, Roman Ermakov","submitted_at":"2025-05-09T12:36:40Z","abstract_excerpt":"The quantum limit is a fundamental lower bound on the uncertainty when estimating a parameter in a system dominated by the minimum amount of noise (quantum noise). For the first time, we derive and demonstrate a quantum limit for temperature-change estimation for coherent phase-OTDR sensing-systems."},"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":"2505.06007","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2025-05-09T12:36:40Z","cross_cats_sorted":[],"title_canon_sha256":"a55fe88d1e89be80415fbe7697d16414c2b2499b3690adba601229959322aad1","abstract_canon_sha256":"3ffbf9d320e81b6fc5b578550c9fccdd0ff6df89cc2aa8856ae0a4d179604875"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:00:52.032851Z","signature_b64":"+yz31M0leVnbBTOpoRR27d5n9ah4vWTNbaNTrKoLGW/KKWV2ChpHhaHvpayjtqCxvVecr6Z5CEGbdrnTlhSGCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5b9379f369684fbaf2e9ac1ce8718e35ad20c5d7999e7c962cb27f75e00cf835","last_reissued_at":"2026-07-05T11:00:52.032381Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:00:52.032381Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Quantum Noise Limited Temperature-Change Estimation for Phase-OTDR Employing Coherent Detection","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Darko Zibar, Francesco Da Ros, Huwei Wang, Roman Ermakov","submitted_at":"2025-05-09T12:36:40Z","abstract_excerpt":"The quantum limit is a fundamental lower bound on the uncertainty when estimating a parameter in a system dominated by the minimum amount of noise (quantum noise). For the first time, we derive and demonstrate a quantum limit for temperature-change estimation for coherent phase-OTDR sensing-systems."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.06007","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/2505.06007/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":"2505.06007","created_at":"2026-07-05T11:00:52.032443+00:00"},{"alias_kind":"arxiv_version","alias_value":"2505.06007v1","created_at":"2026-07-05T11:00:52.032443+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.06007","created_at":"2026-07-05T11:00:52.032443+00:00"},{"alias_kind":"pith_short_12","alias_value":"LOJXT43JNBH3","created_at":"2026-07-05T11:00:52.032443+00:00"},{"alias_kind":"pith_short_16","alias_value":"LOJXT43JNBH3V4XJ","created_at":"2026-07-05T11:00:52.032443+00:00"},{"alias_kind":"pith_short_8","alias_value":"LOJXT43J","created_at":"2026-07-05T11:00:52.032443+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/LOJXT43JNBH3V4XJVQOOQ4MOGW","json":"https://pith.science/pith/LOJXT43JNBH3V4XJVQOOQ4MOGW.json","graph_json":"https://pith.science/api/pith-number/LOJXT43JNBH3V4XJVQOOQ4MOGW/graph.json","events_json":"https://pith.science/api/pith-number/LOJXT43JNBH3V4XJVQOOQ4MOGW/events.json","paper":"https://pith.science/paper/LOJXT43J"},"agent_actions":{"view_html":"https://pith.science/pith/LOJXT43JNBH3V4XJVQOOQ4MOGW","download_json":"https://pith.science/pith/LOJXT43JNBH3V4XJVQOOQ4MOGW.json","view_paper":"https://pith.science/paper/LOJXT43J","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2505.06007&json=true","fetch_graph":"https://pith.science/api/pith-number/LOJXT43JNBH3V4XJVQOOQ4MOGW/graph.json","fetch_events":"https://pith.science/api/pith-number/LOJXT43JNBH3V4XJVQOOQ4MOGW/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/LOJXT43JNBH3V4XJVQOOQ4MOGW/action/timestamp_anchor","attest_storage":"https://pith.science/pith/LOJXT43JNBH3V4XJVQOOQ4MOGW/action/storage_attestation","attest_author":"https://pith.science/pith/LOJXT43JNBH3V4XJVQOOQ4MOGW/action/author_attestation","sign_citation":"https://pith.science/pith/LOJXT43JNBH3V4XJVQOOQ4MOGW/action/citation_signature","submit_replication":"https://pith.science/pith/LOJXT43JNBH3V4XJVQOOQ4MOGW/action/replication_record"}},"created_at":"2026-07-05T11:00:52.032443+00:00","updated_at":"2026-07-05T11:00:52.032443+00:00"}