{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:FQFITIS4NOMVASCNG2VDQXTBDJ","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":"173dd2e23039b25deec5be7ee380cec3a554ad05569aa88ff9e135b746e53cad","cross_cats_sorted":["physics.optics"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2022-06-22T21:10:33Z","title_canon_sha256":"b481c7d2bca64c1dea6fff528f9d71f4ef8044520bdac39e8f80697ba6686db7"},"schema_version":"1.0","source":{"id":"2206.11387","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2206.11387","created_at":"2026-07-05T05:28:45Z"},{"alias_kind":"arxiv_version","alias_value":"2206.11387v2","created_at":"2026-07-05T05:28:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2206.11387","created_at":"2026-07-05T05:28:45Z"},{"alias_kind":"pith_short_12","alias_value":"FQFITIS4NOMV","created_at":"2026-07-05T05:28:45Z"},{"alias_kind":"pith_short_16","alias_value":"FQFITIS4NOMVASCN","created_at":"2026-07-05T05:28:45Z"},{"alias_kind":"pith_short_8","alias_value":"FQFITIS4","created_at":"2026-07-05T05:28:45Z"}],"graph_snapshots":[{"event_id":"sha256:5e53a2530322eaba4e8b4e02e6997aae0d02920d7bf6e791fe1b5e155fe88e4d","target":"graph","created_at":"2026-07-05T05:28:45Z","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/2206.11387/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We examine the precision limits of Hong-Ou-Mandel (HOM) timing measurements, as well as precision limits applying to generalized two-photon measurements. As a special case, we consider the use of two-photon measurements using photons with variable bandwidths and frequency correlations. When the photon bandwidths are not equal, maximizing the measurement precision involves a trade-off between high interference visibility and strong frequency anticorrelations, with the optimal precision occuring when the photons share non-maximal frequency anticorrelations. We show that a generalized measurement","authors_text":"Jeff S. Lundeen, Kyle M. Jordan, Raphael A. Abrahao","cross_cats":["physics.optics"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2022-06-22T21:10:33Z","title":"Quantum metrology timing limits of the Hong-Ou-Mandel interferometer and of general two-photon measurements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2206.11387","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":"sha256:60949abb11eb1a6bb1a5badef36bb2626de2cb5a799ddaa83c415866fafd7cc1","target":"record","created_at":"2026-07-05T05:28:45Z","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":"173dd2e23039b25deec5be7ee380cec3a554ad05569aa88ff9e135b746e53cad","cross_cats_sorted":["physics.optics"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2022-06-22T21:10:33Z","title_canon_sha256":"b481c7d2bca64c1dea6fff528f9d71f4ef8044520bdac39e8f80697ba6686db7"},"schema_version":"1.0","source":{"id":"2206.11387","kind":"arxiv","version":2}},"canonical_sha256":"2c0a89a25c6b9950484d36aa385e611a5690b5b219a27f649da54432906143c4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2c0a89a25c6b9950484d36aa385e611a5690b5b219a27f649da54432906143c4","first_computed_at":"2026-07-05T05:28:45.810527Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:28:45.810527Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WDO4AAaXHEwebDV4ExrAu5voi6ZAoiBSN4RVvDz4SAQwdfhPwIDEb+lwVuZ7HqZEEvxM28HiQnxobKMiy22vCw==","signature_status":"signed_v1","signed_at":"2026-07-05T05:28:45.810915Z","signed_message":"canonical_sha256_bytes"},"source_id":"2206.11387","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:60949abb11eb1a6bb1a5badef36bb2626de2cb5a799ddaa83c415866fafd7cc1","sha256:5e53a2530322eaba4e8b4e02e6997aae0d02920d7bf6e791fe1b5e155fe88e4d"],"state_sha256":"c627df677053215987f15c299f56756d51ec91bfed18acb95dee887685c4c986"}