{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:Z6CKQ633PLQTZM2GRG6PM3WJD3","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":"8e9eb3722df7dd2f6b35fe1295ebbce51829e68613068f0766d964a45b1d166b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2016-01-18T15:49:59Z","title_canon_sha256":"97b1e3dd844ca5876b211f0c61f2c747de84894c4d4401ffc37762c07475de9c"},"schema_version":"1.0","source":{"id":"1601.04582","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.04582","created_at":"2026-05-18T01:17:32Z"},{"alias_kind":"arxiv_version","alias_value":"1601.04582v1","created_at":"2026-05-18T01:17:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.04582","created_at":"2026-05-18T01:17:32Z"},{"alias_kind":"pith_short_12","alias_value":"Z6CKQ633PLQT","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"Z6CKQ633PLQTZM2G","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"Z6CKQ633","created_at":"2026-05-18T12:30:53Z"}],"graph_snapshots":[{"event_id":"sha256:0e503504ac1c23ece24b582d9e40a69fbd041df9ad69fd03d3b1fb51c0062fcb","target":"graph","created_at":"2026-05-18T01:17:32Z","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":"Transition frequencies of atoms and ions are among the most accurately accessible quantities in nature, playing important roles in pushing the frontiers of science by testing fundamental laws of physics, in addition to a wide range of applications such as satellite navigation systems. Atomic clocks based on optical transitions approach uncertainties of $10^{-18}$, where full frequency descriptions are far beyond the reach of the SI second. Frequency ratios of such super clocks, on the other hand, are not subject to this limitation. They can therefore verify consistency and overall accuracy for","authors_text":"Hidetoshi Katori, Ichiro Ushijima, Manoj Das, Masao Takamoto, Nils Nemitz, Noriaki Ohmae, Takuya Ohkubo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2016-01-18T15:49:59Z","title":"Frequency ratio of Yb and Sr clocks with $5 \\times 10^{-17}$ uncertainty at 150 s averaging time"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.04582","kind":"arxiv","version":1},"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:aac418541db76ff00eedad42d4ed2a5026bb2f055bff49999e3a990de39e474a","target":"record","created_at":"2026-05-18T01:17:32Z","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":"8e9eb3722df7dd2f6b35fe1295ebbce51829e68613068f0766d964a45b1d166b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2016-01-18T15:49:59Z","title_canon_sha256":"97b1e3dd844ca5876b211f0c61f2c747de84894c4d4401ffc37762c07475de9c"},"schema_version":"1.0","source":{"id":"1601.04582","kind":"arxiv","version":1}},"canonical_sha256":"cf84a87b7b7ae13cb34689bcf66ec91edec87bfddd268ec783df226a9d7e3c7c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cf84a87b7b7ae13cb34689bcf66ec91edec87bfddd268ec783df226a9d7e3c7c","first_computed_at":"2026-05-18T01:17:32.564355Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:17:32.564355Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Op0jKSy4rhdZXS9W+80duDp7tbKEtTWviuQ//BV8/7t9AC7Mop2zWBvGAvvgOn90a/vz1quakwoww32GVeGzDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:17:32.565019Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.04582","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:aac418541db76ff00eedad42d4ed2a5026bb2f055bff49999e3a990de39e474a","sha256:0e503504ac1c23ece24b582d9e40a69fbd041df9ad69fd03d3b1fb51c0062fcb"],"state_sha256":"86d284cc40f2368e6bc8b47b9bd048f5e8615e13b1b068b20277ea2a7f290280"}