{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:HQZPLJIPCVSCHPSFCPBK6TGXRT","short_pith_number":"pith:HQZPLJIP","canonical_record":{"source":{"id":"2503.01959","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-03-03T19:00:01Z","cross_cats_sorted":["nlin.CD"],"title_canon_sha256":"cdfe0b0e894f757a5f7d172a9fef9e94d24d8a57f99fb13ca7b107021cece4d5","abstract_canon_sha256":"a7987eb9dcd72fbb70c0029e3c6d3755fb514a13b41411276804e11fb347964f"},"schema_version":"1.0"},"canonical_sha256":"3c32f5a50f156423be4513c2af4cd78cf501db4befcd47e9b65c0f0af81ea473","source":{"kind":"arxiv","id":"2503.01959","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.01959","created_at":"2026-07-05T11:30:42Z"},{"alias_kind":"arxiv_version","alias_value":"2503.01959v2","created_at":"2026-07-05T11:30:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.01959","created_at":"2026-07-05T11:30:42Z"},{"alias_kind":"pith_short_12","alias_value":"HQZPLJIPCVSC","created_at":"2026-07-05T11:30:42Z"},{"alias_kind":"pith_short_16","alias_value":"HQZPLJIPCVSCHPSF","created_at":"2026-07-05T11:30:42Z"},{"alias_kind":"pith_short_8","alias_value":"HQZPLJIP","created_at":"2026-07-05T11:30:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:HQZPLJIPCVSCHPSFCPBK6TGXRT","target":"record","payload":{"canonical_record":{"source":{"id":"2503.01959","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-03-03T19:00:01Z","cross_cats_sorted":["nlin.CD"],"title_canon_sha256":"cdfe0b0e894f757a5f7d172a9fef9e94d24d8a57f99fb13ca7b107021cece4d5","abstract_canon_sha256":"a7987eb9dcd72fbb70c0029e3c6d3755fb514a13b41411276804e11fb347964f"},"schema_version":"1.0"},"canonical_sha256":"3c32f5a50f156423be4513c2af4cd78cf501db4befcd47e9b65c0f0af81ea473","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:30:42.066142Z","signature_b64":"kzupSCYU4dAam0F74fliLGmjTadjfolSCumev93q7sdUzpsCuTBGJ1SeRC3uuNNdp2KkOeIex+1k+ozjtZJODg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3c32f5a50f156423be4513c2af4cd78cf501db4befcd47e9b65c0f0af81ea473","last_reissued_at":"2026-07-05T11:30:42.065624Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:30:42.065624Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2503.01959","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":"2026-07-05T11:30:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WJt2mkv62OJAT4mAWHhYbams6O9xIK+1TlS67lk5CfTdRqhkMF4zVamOTRNpSj7+OmpSEu2rGf6HXVAMQWX2DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T20:18:47.397575Z"},"content_sha256":"e91ffd5f42e092b56f62d442b8a3661ce9ad39225327fc0ee41f20cadcaa6b86","schema_version":"1.0","event_id":"sha256:e91ffd5f42e092b56f62d442b8a3661ce9ad39225327fc0ee41f20cadcaa6b86"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:HQZPLJIPCVSCHPSFCPBK6TGXRT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Enhanced quantum frequency estimation by nonlinear scrambling","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nlin.CD"],"primary_cat":"quant-ph","authors_text":"Alessandro Ferraro, Matteo G. A. Paris, Sara Dornetti, Victor Montenegro","submitted_at":"2025-03-03T19:00:01Z","abstract_excerpt":"Frequency estimation, a cornerstone of basic and applied sciences, has been significantly enhanced by quantum sensing strategies. Despite breakthroughs in quantum-enhanced frequency estimation, key challenges remain: static probes limit flexibility, and the interplay between resource efficiency, sensing precision, and potential enhancements from nonlinear probes remains not fully understood. In this work, we show that dynamically encoding an unknown frequency in a nonlinear quantum electromagnetic field can significantly improve frequency estimation. To provide a fair comparison of resources, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.01959","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2503.01959/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:30:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hXUddOiG6pMbQGwFAB9dWDg/ouTcepBY34HyUJCpLWU8p8IywG4bxIa98jKS3ZkbyLrb4pfN597X3sSH9qOBDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T20:18:47.398876Z"},"content_sha256":"bc7d92f6e5698fc9180256e5fec42ef929f37c744aeedb20b928a2bcec3b09ab","schema_version":"1.0","event_id":"sha256:bc7d92f6e5698fc9180256e5fec42ef929f37c744aeedb20b928a2bcec3b09ab"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HQZPLJIPCVSCHPSFCPBK6TGXRT/bundle.json","state_url":"https://pith.science/pith/HQZPLJIPCVSCHPSFCPBK6TGXRT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HQZPLJIPCVSCHPSFCPBK6TGXRT/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":"2026-08-20T20:18:47Z","links":{"resolver":"https://pith.science/pith/HQZPLJIPCVSCHPSFCPBK6TGXRT","bundle":"https://pith.science/pith/HQZPLJIPCVSCHPSFCPBK6TGXRT/bundle.json","state":"https://pith.science/pith/HQZPLJIPCVSCHPSFCPBK6TGXRT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HQZPLJIPCVSCHPSFCPBK6TGXRT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:HQZPLJIPCVSCHPSFCPBK6TGXRT","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":"a7987eb9dcd72fbb70c0029e3c6d3755fb514a13b41411276804e11fb347964f","cross_cats_sorted":["nlin.CD"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-03-03T19:00:01Z","title_canon_sha256":"cdfe0b0e894f757a5f7d172a9fef9e94d24d8a57f99fb13ca7b107021cece4d5"},"schema_version":"1.0","source":{"id":"2503.01959","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.01959","created_at":"2026-07-05T11:30:42Z"},{"alias_kind":"arxiv_version","alias_value":"2503.01959v2","created_at":"2026-07-05T11:30:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.01959","created_at":"2026-07-05T11:30:42Z"},{"alias_kind":"pith_short_12","alias_value":"HQZPLJIPCVSC","created_at":"2026-07-05T11:30:42Z"},{"alias_kind":"pith_short_16","alias_value":"HQZPLJIPCVSCHPSF","created_at":"2026-07-05T11:30:42Z"},{"alias_kind":"pith_short_8","alias_value":"HQZPLJIP","created_at":"2026-07-05T11:30:42Z"}],"graph_snapshots":[{"event_id":"sha256:bc7d92f6e5698fc9180256e5fec42ef929f37c744aeedb20b928a2bcec3b09ab","target":"graph","created_at":"2026-07-05T11:30:42Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2503.01959/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Frequency estimation, a cornerstone of basic and applied sciences, has been significantly enhanced by quantum sensing strategies. Despite breakthroughs in quantum-enhanced frequency estimation, key challenges remain: static probes limit flexibility, and the interplay between resource efficiency, sensing precision, and potential enhancements from nonlinear probes remains not fully understood. In this work, we show that dynamically encoding an unknown frequency in a nonlinear quantum electromagnetic field can significantly improve frequency estimation. To provide a fair comparison of resources, ","authors_text":"Alessandro Ferraro, Matteo G. A. Paris, Sara Dornetti, Victor Montenegro","cross_cats":["nlin.CD"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-03-03T19:00:01Z","title":"Enhanced quantum frequency estimation by nonlinear scrambling"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.01959","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:e91ffd5f42e092b56f62d442b8a3661ce9ad39225327fc0ee41f20cadcaa6b86","target":"record","created_at":"2026-07-05T11:30:42Z","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":"a7987eb9dcd72fbb70c0029e3c6d3755fb514a13b41411276804e11fb347964f","cross_cats_sorted":["nlin.CD"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-03-03T19:00:01Z","title_canon_sha256":"cdfe0b0e894f757a5f7d172a9fef9e94d24d8a57f99fb13ca7b107021cece4d5"},"schema_version":"1.0","source":{"id":"2503.01959","kind":"arxiv","version":2}},"canonical_sha256":"3c32f5a50f156423be4513c2af4cd78cf501db4befcd47e9b65c0f0af81ea473","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3c32f5a50f156423be4513c2af4cd78cf501db4befcd47e9b65c0f0af81ea473","first_computed_at":"2026-07-05T11:30:42.065624Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:30:42.065624Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kzupSCYU4dAam0F74fliLGmjTadjfolSCumev93q7sdUzpsCuTBGJ1SeRC3uuNNdp2KkOeIex+1k+ozjtZJODg==","signature_status":"signed_v1","signed_at":"2026-07-05T11:30:42.066142Z","signed_message":"canonical_sha256_bytes"},"source_id":"2503.01959","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e91ffd5f42e092b56f62d442b8a3661ce9ad39225327fc0ee41f20cadcaa6b86","sha256:bc7d92f6e5698fc9180256e5fec42ef929f37c744aeedb20b928a2bcec3b09ab"],"state_sha256":"4d6d62a4aeefd5f146e3a69ebdbcb96a99c9f0dff94b3455cf4bfbc05731ff33"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u2dlCiPkzb3zUa7lY1GmfK85kk8p1isXb1pLdYFd1A0tSeo9udfATMf8gZa04TwhA/zdxdnJl3AQJCt9/UGNBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T20:18:47.405034Z","bundle_sha256":"f1a36dafba2f9623636b1eb03eed543a9a0f139364f973a76c50b939cb4efb56"}}