{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:UQ4BLWR4UZZOIT7JZFSXXRRBWP","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":"3a9f306f9aaf7c6c01f7c78a58d10ab071d11b641e677efa9456d5fad08e965c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2014-05-22T20:18:23Z","title_canon_sha256":"2ad103220fbe3f8203aa67a31014af9cbae866d7bb5d1fc0aa2ed82eaec9707f"},"schema_version":"1.0","source":{"id":"1405.5895","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1405.5895","created_at":"2026-05-18T01:43:07Z"},{"alias_kind":"arxiv_version","alias_value":"1405.5895v2","created_at":"2026-05-18T01:43:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1405.5895","created_at":"2026-05-18T01:43:07Z"},{"alias_kind":"pith_short_12","alias_value":"UQ4BLWR4UZZO","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"UQ4BLWR4UZZOIT7J","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"UQ4BLWR4","created_at":"2026-05-18T12:28:52Z"}],"graph_snapshots":[{"event_id":"sha256:6121ddcd6aa0021e7e6dc3c8f94955fb1bfa5577d458f51c5733a697c8429d33","target":"graph","created_at":"2026-05-18T01:43:07Z","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":"It is well known that temperature variations and acoustic noise affect ultrastable frequency dissemination along optical fiber. Active stabilization techniques are in general adopted to compensate for the fiber-induced phase noise. However, despite this compensation, the ultimate link performances remain limited by the so called delay-unsuppressed fiber noise that is related to the propagation delay of the light in the fiber. In this paper, we demonstrate a data post-processing approach which enables us to overcome this limit. We implement a subtraction algorithm between the optical signal del","authors_text":"A. Godone, A. Mura, C. Clivati, C. E. Calosso, D. Calonico, E. Bertacco, F. Levi, G. A. Costanzo, M. Frittelli, S. Micalizio","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2014-05-22T20:18:23Z","title":"Beyond the fundamental noise limit in coherent optical fiber links"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.5895","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":"sha256:4d6ecaf9b16e5a29643da5d64831db522b0df0b07e37d01364d9959f8face8a9","target":"record","created_at":"2026-05-18T01:43:07Z","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":"3a9f306f9aaf7c6c01f7c78a58d10ab071d11b641e677efa9456d5fad08e965c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2014-05-22T20:18:23Z","title_canon_sha256":"2ad103220fbe3f8203aa67a31014af9cbae866d7bb5d1fc0aa2ed82eaec9707f"},"schema_version":"1.0","source":{"id":"1405.5895","kind":"arxiv","version":2}},"canonical_sha256":"a43815da3ca672e44fe9c9657bc621b3feeeee1d5f28ecd390172d9d1f50c1b5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a43815da3ca672e44fe9c9657bc621b3feeeee1d5f28ecd390172d9d1f50c1b5","first_computed_at":"2026-05-18T01:43:07.252215Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:43:07.252215Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AaAK7N014VUZSkB33cOgt2rtxGDAT0oeOwqiCIa1WcigG4gorSZyhFEB3m+jjS39VUmwD44mBKbbnyyYI7VaDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:43:07.252909Z","signed_message":"canonical_sha256_bytes"},"source_id":"1405.5895","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4d6ecaf9b16e5a29643da5d64831db522b0df0b07e37d01364d9959f8face8a9","sha256:6121ddcd6aa0021e7e6dc3c8f94955fb1bfa5577d458f51c5733a697c8429d33"],"state_sha256":"3c66d9c57d6526929cb2f9f9cc0b1a16e3dc9bb180e568adce50a5597452b19b"}