{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:2HBH34RSINHNXY5CH2Y25SKEJ4","short_pith_number":"pith:2HBH34RS","canonical_record":{"source":{"id":"1806.02260","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-06-06T15:52:30Z","cross_cats_sorted":[],"title_canon_sha256":"bcf0bd87bf502ea504121c24517062253e77398a0e316fb8bc8f3ff96b515f77","abstract_canon_sha256":"e5038887843e82b8f77ff6a55ce3734e1f08c0e78aa4542bfd042f1f07de993d"},"schema_version":"1.0"},"canonical_sha256":"d1c27df232434edbe3a23eb1aec9444f31322ebb68aedb0884ca242a5e0d04e2","source":{"kind":"arxiv","id":"1806.02260","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.02260","created_at":"2026-05-18T00:14:02Z"},{"alias_kind":"arxiv_version","alias_value":"1806.02260v1","created_at":"2026-05-18T00:14:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.02260","created_at":"2026-05-18T00:14:02Z"},{"alias_kind":"pith_short_12","alias_value":"2HBH34RSINHN","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"2HBH34RSINHNXY5C","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"2HBH34RS","created_at":"2026-05-18T12:32:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:2HBH34RSINHNXY5CH2Y25SKEJ4","target":"record","payload":{"canonical_record":{"source":{"id":"1806.02260","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-06-06T15:52:30Z","cross_cats_sorted":[],"title_canon_sha256":"bcf0bd87bf502ea504121c24517062253e77398a0e316fb8bc8f3ff96b515f77","abstract_canon_sha256":"e5038887843e82b8f77ff6a55ce3734e1f08c0e78aa4542bfd042f1f07de993d"},"schema_version":"1.0"},"canonical_sha256":"d1c27df232434edbe3a23eb1aec9444f31322ebb68aedb0884ca242a5e0d04e2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:14:02.058107Z","signature_b64":"A2jVH/1HUPMQiDnNvaMt0qzhA/JuNu8GZymPEMY8szvjiEiw4WYT2tLqNS0hMilNm7WHLCcldQwFXf4QoAMODA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d1c27df232434edbe3a23eb1aec9444f31322ebb68aedb0884ca242a5e0d04e2","last_reissued_at":"2026-05-18T00:14:02.057377Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:14:02.057377Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1806.02260","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:14:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AS7t1ut7J1THwNgpnLJo74pY8HqZU+1utgTqNhZiB0e32xQkFv0tmv9vf2e5hNkCRpAv0857PHaQjHwDH4z0Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T03:37:35.208979Z"},"content_sha256":"9fa3d5ddf387618c39f8bd7b85d9a2162efa93c68a2f35907ebd6eecaf311e8b","schema_version":"1.0","event_id":"sha256:9fa3d5ddf387618c39f8bd7b85d9a2162efa93c68a2f35907ebd6eecaf311e8b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:2HBH34RSINHNXY5CH2Y25SKEJ4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dual-Mode Operation of an Optical Lattice Clock Using Strontium and Ytterbium Atoms","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Daisuke Akamatsu, Feng-Lei Hong, Kazumoto Hosaka, Masami Yasuda, Takehiko Tanabe, Takumi Kobayashi, Yusuke Hisai","submitted_at":"2018-06-06T15:52:30Z","abstract_excerpt":"We have developed an optical lattice clock that can operate in dual modes: a strontium (Sr) clock mode and an ytterbium (Yb) clock mode. Dual-mode operation of the Sr-Yb optical lattice clock is achieved by alternately cooling and trapping $^{87}$Sr and $^{171}$Yb atoms inside the vacuum chamber of the clock. Optical lattices for Sr and Yb atoms were arranged with horizontal and vertical configurations, respectively, resulting in a small distance of the order of 100 $\\mu$m between the trapped Sr and Yb atoms. The $^{1}$S$_{0}$-$^{3}$P$_{0}$ clock transitions in the trapped atoms were interroga"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.02260","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:14:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ibTs6oYBw6PF6q771J6C3mSSF+0vZaEsze25p9dG5u/Ln2I0LW6vOrL/qH35VMFSN9S2Xq6reOTMjwOlOWN1Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T03:37:35.209606Z"},"content_sha256":"db3359107e0d6a853ed6b307b32441ffbf2058425b07c24751b001fb643fde88","schema_version":"1.0","event_id":"sha256:db3359107e0d6a853ed6b307b32441ffbf2058425b07c24751b001fb643fde88"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2HBH34RSINHNXY5CH2Y25SKEJ4/bundle.json","state_url":"https://pith.science/pith/2HBH34RSINHNXY5CH2Y25SKEJ4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2HBH34RSINHNXY5CH2Y25SKEJ4/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-28T03:37:35Z","links":{"resolver":"https://pith.science/pith/2HBH34RSINHNXY5CH2Y25SKEJ4","bundle":"https://pith.science/pith/2HBH34RSINHNXY5CH2Y25SKEJ4/bundle.json","state":"https://pith.science/pith/2HBH34RSINHNXY5CH2Y25SKEJ4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2HBH34RSINHNXY5CH2Y25SKEJ4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:2HBH34RSINHNXY5CH2Y25SKEJ4","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":"e5038887843e82b8f77ff6a55ce3734e1f08c0e78aa4542bfd042f1f07de993d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-06-06T15:52:30Z","title_canon_sha256":"bcf0bd87bf502ea504121c24517062253e77398a0e316fb8bc8f3ff96b515f77"},"schema_version":"1.0","source":{"id":"1806.02260","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.02260","created_at":"2026-05-18T00:14:02Z"},{"alias_kind":"arxiv_version","alias_value":"1806.02260v1","created_at":"2026-05-18T00:14:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.02260","created_at":"2026-05-18T00:14:02Z"},{"alias_kind":"pith_short_12","alias_value":"2HBH34RSINHN","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"2HBH34RSINHNXY5C","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"2HBH34RS","created_at":"2026-05-18T12:32:02Z"}],"graph_snapshots":[{"event_id":"sha256:db3359107e0d6a853ed6b307b32441ffbf2058425b07c24751b001fb643fde88","target":"graph","created_at":"2026-05-18T00:14:02Z","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 have developed an optical lattice clock that can operate in dual modes: a strontium (Sr) clock mode and an ytterbium (Yb) clock mode. Dual-mode operation of the Sr-Yb optical lattice clock is achieved by alternately cooling and trapping $^{87}$Sr and $^{171}$Yb atoms inside the vacuum chamber of the clock. Optical lattices for Sr and Yb atoms were arranged with horizontal and vertical configurations, respectively, resulting in a small distance of the order of 100 $\\mu$m between the trapped Sr and Yb atoms. The $^{1}$S$_{0}$-$^{3}$P$_{0}$ clock transitions in the trapped atoms were interroga","authors_text":"Daisuke Akamatsu, Feng-Lei Hong, Kazumoto Hosaka, Masami Yasuda, Takehiko Tanabe, Takumi Kobayashi, Yusuke Hisai","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-06-06T15:52:30Z","title":"Dual-Mode Operation of an Optical Lattice Clock Using Strontium and Ytterbium Atoms"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.02260","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":"sha256:9fa3d5ddf387618c39f8bd7b85d9a2162efa93c68a2f35907ebd6eecaf311e8b","target":"record","created_at":"2026-05-18T00:14:02Z","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":"e5038887843e82b8f77ff6a55ce3734e1f08c0e78aa4542bfd042f1f07de993d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2018-06-06T15:52:30Z","title_canon_sha256":"bcf0bd87bf502ea504121c24517062253e77398a0e316fb8bc8f3ff96b515f77"},"schema_version":"1.0","source":{"id":"1806.02260","kind":"arxiv","version":1}},"canonical_sha256":"d1c27df232434edbe3a23eb1aec9444f31322ebb68aedb0884ca242a5e0d04e2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d1c27df232434edbe3a23eb1aec9444f31322ebb68aedb0884ca242a5e0d04e2","first_computed_at":"2026-05-18T00:14:02.057377Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:14:02.057377Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"A2jVH/1HUPMQiDnNvaMt0qzhA/JuNu8GZymPEMY8szvjiEiw4WYT2tLqNS0hMilNm7WHLCcldQwFXf4QoAMODA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:14:02.058107Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.02260","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9fa3d5ddf387618c39f8bd7b85d9a2162efa93c68a2f35907ebd6eecaf311e8b","sha256:db3359107e0d6a853ed6b307b32441ffbf2058425b07c24751b001fb643fde88"],"state_sha256":"658071d4d0659305fcaffba7d3a6e262e4889f77be7d5cbced614dfcadb64eae"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kL1emUuLWVbhfH/OnnuMTJaoTlNNzCjACwE0v2Uo2+rDEGzn6OqZGext8wCtShhxjonGo46Y1baEsDoeSR9wBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T03:37:35.212598Z","bundle_sha256":"e4c85562ce17b0a6ec2f747539232fd43e3723cba1d25161c602c70b012e3370"}}