{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:C7IFTYC63ZY676DNBFMWNXIFOB","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":"c63ab6014d4e543d7b1e4c60ea6c25f3cd8fbf6123727eadc7e1dee4a331705c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-01-21T08:36:33Z","title_canon_sha256":"eff555d7fa87745047999c110e473fe83682f9931f710f1783f76437c937b97b"},"schema_version":"1.0","source":{"id":"1601.05548","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.05548","created_at":"2026-05-18T01:11:49Z"},{"alias_kind":"arxiv_version","alias_value":"1601.05548v1","created_at":"2026-05-18T01:11:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.05548","created_at":"2026-05-18T01:11:49Z"},{"alias_kind":"pith_short_12","alias_value":"C7IFTYC63ZY6","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_16","alias_value":"C7IFTYC63ZY676DN","created_at":"2026-05-18T12:30:09Z"},{"alias_kind":"pith_short_8","alias_value":"C7IFTYC6","created_at":"2026-05-18T12:30:09Z"}],"graph_snapshots":[{"event_id":"sha256:d9677c661dbb55a32db6d62e80fb6be4372454569fc95b8180db8b0a3339ae21","target":"graph","created_at":"2026-05-18T01:11:49Z","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":"It has recently been shown that optical reflection gratings fabricated directly into an atom chip provide a simple and effective way to trap and cool substantial clouds of atoms [1,2]. In this article we describe how the gratings are designed and micro-fabricated and we characterise their optical properties, which determine their effectiveness as a cold atom source. We use simple scalar diffraction theory to understand how the morphology of the gratings determines the power in the diffracted beams.","authors_text":"A. S. Arnold, E. A. Hinds, E. Riis, I. M. Rabey, J. P. Cotter, J. P. McGilligan, K. Docherty, P. F. Griffin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-01-21T08:36:33Z","title":"Design and fabrication of diffractive atom chips for laser cooling and trapping"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.05548","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:d4458a956dc55b2e09249342150880d9998bd276c0aeb10316e372f6854327c4","target":"record","created_at":"2026-05-18T01:11:49Z","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":"c63ab6014d4e543d7b1e4c60ea6c25f3cd8fbf6123727eadc7e1dee4a331705c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-01-21T08:36:33Z","title_canon_sha256":"eff555d7fa87745047999c110e473fe83682f9931f710f1783f76437c937b97b"},"schema_version":"1.0","source":{"id":"1601.05548","kind":"arxiv","version":1}},"canonical_sha256":"17d059e05ede71eff86d095966dd057070fb3130ff835bee0a224349e182f952","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"17d059e05ede71eff86d095966dd057070fb3130ff835bee0a224349e182f952","first_computed_at":"2026-05-18T01:11:49.816289Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:49.816289Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"l+O9cjH6Td40HQvtp93UzmM7Etd/K7KSgot6cflkVgeh5NCy9+Uw5NKNal/3z4RfSVM5DBV3pYEMahz66wewBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:49.816736Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.05548","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d4458a956dc55b2e09249342150880d9998bd276c0aeb10316e372f6854327c4","sha256:d9677c661dbb55a32db6d62e80fb6be4372454569fc95b8180db8b0a3339ae21"],"state_sha256":"e1d0dcd8e727fb57799b9708ca9a58e4df939051d1775718382df52299fd7707"}