{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:MBG6U5Y2Q6KG7CMIUJN7P7X4FB","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":"327eee589870731549e4321e52200934a546f0adb2a205ac879306d3a00f1cd6","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-12-06T03:55:04Z","title_canon_sha256":"5befa9accbccd768661a0fb82a96357316661dc78751d1f779c0f39679a5c776"},"schema_version":"1.0","source":{"id":"0912.1075","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.1075","created_at":"2026-05-18T02:10:26Z"},{"alias_kind":"arxiv_version","alias_value":"0912.1075v1","created_at":"2026-05-18T02:10:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.1075","created_at":"2026-05-18T02:10:26Z"},{"alias_kind":"pith_short_12","alias_value":"MBG6U5Y2Q6KG","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"MBG6U5Y2Q6KG7CMI","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"MBG6U5Y2","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:278ea21463e6467e03edb5101915086bd3c0ea3183c5a352f0c0b453d8e3dedf","target":"graph","created_at":"2026-05-18T02:10:26Z","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 present a scheme for entangling the atoms of an optical lattice to reduce the quantum projection noise of a clock measurement. The divalent clock atoms are held in a lattice at a ``magic'' wavelength that does not perturb the clock frequency -- to maintain clock accuracy -- while an open-shell J=1/2 ``head'' atom is coherently transported between lattice sites via the lattice polarization. This polarization-dependent ``Archimedes' screw'' transport at magic wavelength takes advantage of the vanishing vector polarizability of the scalar, J=0, clock states of bosonic isotopes of divalent atom","authors_text":"Andrei Derevianko, Jonathan D. Weinstein, Kyle Beloy","cross_cats":["physics.atom-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-12-06T03:55:04Z","title":"Entangling the lattice clock: Towards Heisenberg-limited timekeeping"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.1075","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:ce42b0109e94d0231fb4ac4b52c80f9fd0cd0afc0e53156848cf67ebc17815b8","target":"record","created_at":"2026-05-18T02:10:26Z","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":"327eee589870731549e4321e52200934a546f0adb2a205ac879306d3a00f1cd6","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-12-06T03:55:04Z","title_canon_sha256":"5befa9accbccd768661a0fb82a96357316661dc78751d1f779c0f39679a5c776"},"schema_version":"1.0","source":{"id":"0912.1075","kind":"arxiv","version":1}},"canonical_sha256":"604dea771a87946f8988a25bf7fefc28767a7947e1b07d207a9e38625faefbcf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"604dea771a87946f8988a25bf7fefc28767a7947e1b07d207a9e38625faefbcf","first_computed_at":"2026-05-18T02:10:26.202791Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:10:26.202791Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uHC5eATVfBnrbZp0wYJPHC4Cknb6REWpq7KJmB/u3+4cHtx28mC6iZyvO4Qj7z9zOd/tK5w1pyWbyWn17ShoAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:10:26.203587Z","signed_message":"canonical_sha256_bytes"},"source_id":"0912.1075","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ce42b0109e94d0231fb4ac4b52c80f9fd0cd0afc0e53156848cf67ebc17815b8","sha256:278ea21463e6467e03edb5101915086bd3c0ea3183c5a352f0c0b453d8e3dedf"],"state_sha256":"52ee986a3cfdaa37706d977dbdf3299145ef10c637f667858da83d0acfb84a9d"}