{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:E2HTZ3JWZF24BQR456ORXAAYVM","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":"88a0e0c1b43529392d80d846e162476bbfcf143fea16f289b288c2fb02bc978a","cross_cats_sorted":["physics.chem-ph"],"license":"","primary_cat":"physics.atom-ph","submitted_at":"2007-02-06T18:22:13Z","title_canon_sha256":"7ac9739544f9aa84a113e0d6ce4c6e5fbfe9276a31259148438e014877c2ea28"},"schema_version":"1.0","source":{"id":"physics/0702059","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"physics/0702059","created_at":"2026-05-18T00:36:52Z"},{"alias_kind":"arxiv_version","alias_value":"physics/0702059v1","created_at":"2026-05-18T00:36:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.physics/0702059","created_at":"2026-05-18T00:36:52Z"},{"alias_kind":"pith_short_12","alias_value":"E2HTZ3JWZF24","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"E2HTZ3JWZF24BQR4","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"E2HTZ3JW","created_at":"2026-05-18T12:25:55Z"}],"graph_snapshots":[{"event_id":"sha256:f083971a46f28ea8d462f0072117dbaa98133eb87c314f1c709ad508af80782b","target":"graph","created_at":"2026-05-18T00:36:52Z","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":"Demands from several areas of science and technology have lead to a worldwide search for accurate optical clocks with an uncertainty of 1 part in $10^{18}$, which is $10^{3}$ times more accurate than the present day cesium atomic clocks based on microwave frequency regime. In this article we discuss the electric quadrupole and the hyperfine shifts in the $5s ^{2}S_{1/2}\\longrightarrow4d ^{2}D_{5/2}$ clock transition in $\\mathrm{Sr^{+}}$, one of the most promising candidates for next generation optical clocks. We have applied relativistic coupled cluster theory for determining the electric quad","authors_text":"B. P. Das, Chiranjib Sur, D. Mukherjee, K. V. P. Latha, Rajat K. Chaudhuri","cross_cats":["physics.chem-ph"],"headline":"","license":"","primary_cat":"physics.atom-ph","submitted_at":"2007-02-06T18:22:13Z","title":"Optical frequency standard with $Sr^+$: A theoretical many-body approach"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"physics/0702059","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":"sha256:8a0fea8d27de5d69b212dd26c4fcb504dc2df6ab0ba2a5b0978996152aad9a33","target":"record","created_at":"2026-05-18T00:36:52Z","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":"88a0e0c1b43529392d80d846e162476bbfcf143fea16f289b288c2fb02bc978a","cross_cats_sorted":["physics.chem-ph"],"license":"","primary_cat":"physics.atom-ph","submitted_at":"2007-02-06T18:22:13Z","title_canon_sha256":"7ac9739544f9aa84a113e0d6ce4c6e5fbfe9276a31259148438e014877c2ea28"},"schema_version":"1.0","source":{"id":"physics/0702059","kind":"arxiv","version":1}},"canonical_sha256":"268f3ced36c975c0c23cef9d1b8018ab07600361771d4957f373005bb12a2366","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"268f3ced36c975c0c23cef9d1b8018ab07600361771d4957f373005bb12a2366","first_computed_at":"2026-05-18T00:36:52.429659Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:36:52.429659Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NTa8ZyyUMuZ7x+DmicK4uW/qDWsRglHN4kijeOyp/jITudq7IacJ+mRKJW2P8BAl1hk/OXGsWgeGAXmdOUWRCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:36:52.430188Z","signed_message":"canonical_sha256_bytes"},"source_id":"physics/0702059","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8a0fea8d27de5d69b212dd26c4fcb504dc2df6ab0ba2a5b0978996152aad9a33","sha256:f083971a46f28ea8d462f0072117dbaa98133eb87c314f1c709ad508af80782b"],"state_sha256":"6071b9d4d95ebfe23f777b533e5a47161d3f66b42e8f79a444c3cfcd988de454"}