{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:QPZ7FOX33OANN3RTKUIBQNF3G4","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":"55b91baff45b2896ba407d2d17899ba3cf74a6ec1b767ab4433f3dc1e887fc43","cross_cats_sorted":["physics.optics"],"license":"http://creativecommons.org/licenses/publicdomain/","primary_cat":"physics.atom-ph","submitted_at":"2011-08-05T18:30:50Z","title_canon_sha256":"e1c79aeb3dc8cb0f0aab8f798317f91feccbde30151077206b0aca6da1d4b7f3"},"schema_version":"1.0","source":{"id":"1108.1379","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.1379","created_at":"2026-05-18T04:06:33Z"},{"alias_kind":"arxiv_version","alias_value":"1108.1379v2","created_at":"2026-05-18T04:06:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.1379","created_at":"2026-05-18T04:06:33Z"},{"alias_kind":"pith_short_12","alias_value":"QPZ7FOX33OAN","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"QPZ7FOX33OANN3RT","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"QPZ7FOX3","created_at":"2026-05-18T12:26:39Z"}],"graph_snapshots":[{"event_id":"sha256:621d5bc085f2c18d013e661f187909a27add19f3454ca878b661733f81211201","target":"graph","created_at":"2026-05-18T04:06:33Z","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":"Recently, p-wave cold collisions were shown to dominate the density-dependent shift of the clock transition frequency in a 171Yb optical lattice clock. Here we demonstrate that by operating such a system at the proper excitation fraction, the cold collision shift is canceled below the 5x10^{-18} fractional frequency level. We report inelastic two-body loss rates for 3P0-3P0 and 1S0-3P0 scattering. We also measure interaction shifts in an unpolarized atomic sample. Collision measurements for this spin-1/2 171Yb system are relevant for high performance optical clocks as well as strongly-interact","authors_text":"A. D. Ludlow, A. M. Rey, C. W. Oates, G. Quemener, J. A. Sherman, J. von Stecher, N. D. Lemke","cross_cats":["physics.optics"],"headline":"","license":"http://creativecommons.org/licenses/publicdomain/","primary_cat":"physics.atom-ph","submitted_at":"2011-08-05T18:30:50Z","title":"Cold collision shift cancelation and inelastic scattering in a Yb optical lattice clock"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.1379","kind":"arxiv","version":2},"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:eebababe41d6babb8358e57517d125972caa506dd59138d403a1f32f172925cf","target":"record","created_at":"2026-05-18T04:06:33Z","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":"55b91baff45b2896ba407d2d17899ba3cf74a6ec1b767ab4433f3dc1e887fc43","cross_cats_sorted":["physics.optics"],"license":"http://creativecommons.org/licenses/publicdomain/","primary_cat":"physics.atom-ph","submitted_at":"2011-08-05T18:30:50Z","title_canon_sha256":"e1c79aeb3dc8cb0f0aab8f798317f91feccbde30151077206b0aca6da1d4b7f3"},"schema_version":"1.0","source":{"id":"1108.1379","kind":"arxiv","version":2}},"canonical_sha256":"83f3f2bafbdb80d6ee3355101834bb372f76730ec28df5b4ec74fe8427de9595","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"83f3f2bafbdb80d6ee3355101834bb372f76730ec28df5b4ec74fe8427de9595","first_computed_at":"2026-05-18T04:06:33.018483Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:06:33.018483Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+Kx2QUYrlhx9OjUKD869nfvjpOYwtFMizr9l9egNTvPokyYxoFEggf2nCgPzFckZlsPg+SgPnWSib15zud2wCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:06:33.019175Z","signed_message":"canonical_sha256_bytes"},"source_id":"1108.1379","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eebababe41d6babb8358e57517d125972caa506dd59138d403a1f32f172925cf","sha256:621d5bc085f2c18d013e661f187909a27add19f3454ca878b661733f81211201"],"state_sha256":"518459ec173d8f570fdf13a454b23bf059b2fd56b9082748e90ac592b865236e"}