{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:VL66YEMZQFFY4D2FHIFAFLIEJN","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":"a0d2e1f48bc1a9ed8d1f0a88551296594447931853616355548edd4618119690","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2026-06-29T00:52:22Z","title_canon_sha256":"ee37c4da864a5bc8119d2ef2f3f7eb59c65e0cc8f90241dddb17bd81a0ded800"},"schema_version":"1.0","source":{"id":"2606.29676","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.29676","created_at":"2026-06-30T02:17:30Z"},{"alias_kind":"arxiv_version","alias_value":"2606.29676v1","created_at":"2026-06-30T02:17:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.29676","created_at":"2026-06-30T02:17:30Z"},{"alias_kind":"pith_short_12","alias_value":"VL66YEMZQFFY","created_at":"2026-06-30T02:17:30Z"},{"alias_kind":"pith_short_16","alias_value":"VL66YEMZQFFY4D2F","created_at":"2026-06-30T02:17:30Z"},{"alias_kind":"pith_short_8","alias_value":"VL66YEMZ","created_at":"2026-06-30T02:17:30Z"}],"graph_snapshots":[{"event_id":"sha256:8b65fdbb409b533a24256395a3c0fb0d5ead99e9237a8646b36bf914a1547486","target":"graph","created_at":"2026-06-30T02:17:30Z","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/2606.29676/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Whether fundamental constants vary over time or space is one of the key questions in metrology and cosmology. Among them, variation of the fine structure constant $\\alpha$ is intensively investigated. Yttrium ions Y$^+$ and actinium ions Ac$^+$ have low-lying $D$ states that are suitable for this search, with a proper path for laser cooling and detection. Theoretical calculations show that the sensitivities of the transitions between the ground state and the lowest $^3D_1$ states are $K=9.40$ and $K=9.73$, respectively. By driving the transition between the ground state and the $^3D_1$ states ","authors_text":"Akio Kawasaki","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2026-06-29T00:52:22Z","title":"Low-lying $D$ states in yttrium and actinium ions highly sensitive to variation of the fine structure constant"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.29676","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:bea22b4fa058f615a85ab0c2bc3f5659acb751a989fd94438ce6811172f00f97","target":"record","created_at":"2026-06-30T02:17:30Z","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":"a0d2e1f48bc1a9ed8d1f0a88551296594447931853616355548edd4618119690","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2026-06-29T00:52:22Z","title_canon_sha256":"ee37c4da864a5bc8119d2ef2f3f7eb59c65e0cc8f90241dddb17bd81a0ded800"},"schema_version":"1.0","source":{"id":"2606.29676","kind":"arxiv","version":1}},"canonical_sha256":"aafdec1199814b8e0f453a0a02ad044b459cbd9e489a5deaf11c08e293bdfa4f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aafdec1199814b8e0f453a0a02ad044b459cbd9e489a5deaf11c08e293bdfa4f","first_computed_at":"2026-06-30T02:17:30.322030Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-30T02:17:30.322030Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"u64pWgTgn9L1cV3QCaGordtPvRSMCuGXawPsBS3Rbj0T9fQ2W253V5LwBP8kq7mOTR4lSPVSfLjOjx+S9uLaDA==","signature_status":"signed_v1","signed_at":"2026-06-30T02:17:30.322475Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.29676","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bea22b4fa058f615a85ab0c2bc3f5659acb751a989fd94438ce6811172f00f97","sha256:8b65fdbb409b533a24256395a3c0fb0d5ead99e9237a8646b36bf914a1547486"],"state_sha256":"54e6ad463bdb8cbde8a93109a1d1bb947b87f0617209afc18734c7ea2f8e3bf7"}