{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:D75ZTNXOFXRALEFBLDX7UZUU4V","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":"2860f6d987041befb78ec037cfef188674dc18e1c31d4e036b66cf30f9573780","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2014-09-09T02:43:24Z","title_canon_sha256":"40e6b98f700c8ac5ed055b97c46fbbd1a7235ccd7560ccb7cc76eecb63190606"},"schema_version":"1.0","source":{"id":"1409.2576","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.2576","created_at":"2026-05-18T01:48:06Z"},{"alias_kind":"arxiv_version","alias_value":"1409.2576v4","created_at":"2026-05-18T01:48:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.2576","created_at":"2026-05-18T01:48:06Z"},{"alias_kind":"pith_short_12","alias_value":"D75ZTNXOFXRA","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"D75ZTNXOFXRALEFB","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"D75ZTNXO","created_at":"2026-05-18T12:28:25Z"}],"graph_snapshots":[{"event_id":"sha256:76280ae7cffd90cc59bcae8f41906dc09b45d505ef1bed888f148649ed4134c4","target":"graph","created_at":"2026-05-18T01:48:06Z","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":"We demonstrate experimentally the existence of magic wavelengths and determine the ratio of the oscillator strengths for a single trapped ion. For the first time, two magic wavelengths for the 40Ca+ clock-transition are measured simultaneously with high precision, giving Lamda|mj|=1/2 = 395.7992(7) nm and Lamda|mj|=3/2 = 395.7990(7) nm. By tuning a laser to an intermediate wavelength between two transitions (4s1/2-4p1/2 and 4s1/2-4p3/2) of 40Ca+, the sensitivity of the clock transition Stark shift to the oscillator strengths for the resonance transition has been greatly enhanced. With the meas","authors_text":"Chengbin Li, Hua Guan, Hu Shao, J. Mitroy, Kelin Gao, Peiliang Liu, Wu Bian, Yao Huang, Yongbo Tang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2014-09-09T02:43:24Z","title":"Measurement of magic wavelengths for the 40Ca+ clock transition"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.2576","kind":"arxiv","version":4},"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:edd6b4d0c6129f4d47c2b33ed8000fbaa1d3f681557a5f67b11448489d27cf45","target":"record","created_at":"2026-05-18T01:48:06Z","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":"2860f6d987041befb78ec037cfef188674dc18e1c31d4e036b66cf30f9573780","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2014-09-09T02:43:24Z","title_canon_sha256":"40e6b98f700c8ac5ed055b97c46fbbd1a7235ccd7560ccb7cc76eecb63190606"},"schema_version":"1.0","source":{"id":"1409.2576","kind":"arxiv","version":4}},"canonical_sha256":"1ffb99b6ee2de20590a158effa6694e56dfc0cd2c6bd0819bca78ac299ba8c88","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1ffb99b6ee2de20590a158effa6694e56dfc0cd2c6bd0819bca78ac299ba8c88","first_computed_at":"2026-05-18T01:48:06.690804Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:06.690804Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hCxrU5vAHhNIrH310+b7LXxp8CuI6rtndFV9TUxKFijz3yQNHlUrn4jb/Ea7reRCtZyzWcpNcJytXvoQGluTAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:06.691375Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.2576","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:edd6b4d0c6129f4d47c2b33ed8000fbaa1d3f681557a5f67b11448489d27cf45","sha256:76280ae7cffd90cc59bcae8f41906dc09b45d505ef1bed888f148649ed4134c4"],"state_sha256":"674af542bfe4d31fd8e4f7b315a9b5bfcbf32eac96968086c754498a7ff587ed"}