{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:EYAZX4VTB74ZPETCEXNS46QVYN","short_pith_number":"pith:EYAZX4VT","canonical_record":{"source":{"id":"2404.13210","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2024-04-19T23:17:37Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"3b691629d45cb08cf0ba0ffecab8078945f33c4b1fabe5d7d260b8c9894c8635","abstract_canon_sha256":"7c9b414b6c2b7002e55a833094cd1b1cf3a1af0068638668a38ed1ed90d00d9e"},"schema_version":"1.0"},"canonical_sha256":"26019bf2b30ff997926225db2e7a15c36993a2537c7d1253d14074386ca38535","source":{"kind":"arxiv","id":"2404.13210","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2404.13210","created_at":"2026-07-05T08:10:29Z"},{"alias_kind":"arxiv_version","alias_value":"2404.13210v1","created_at":"2026-07-05T08:10:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.13210","created_at":"2026-07-05T08:10:29Z"},{"alias_kind":"pith_short_12","alias_value":"EYAZX4VTB74Z","created_at":"2026-07-05T08:10:29Z"},{"alias_kind":"pith_short_16","alias_value":"EYAZX4VTB74ZPETC","created_at":"2026-07-05T08:10:29Z"},{"alias_kind":"pith_short_8","alias_value":"EYAZX4VT","created_at":"2026-07-05T08:10:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:EYAZX4VTB74ZPETCEXNS46QVYN","target":"record","payload":{"canonical_record":{"source":{"id":"2404.13210","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2024-04-19T23:17:37Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"3b691629d45cb08cf0ba0ffecab8078945f33c4b1fabe5d7d260b8c9894c8635","abstract_canon_sha256":"7c9b414b6c2b7002e55a833094cd1b1cf3a1af0068638668a38ed1ed90d00d9e"},"schema_version":"1.0"},"canonical_sha256":"26019bf2b30ff997926225db2e7a15c36993a2537c7d1253d14074386ca38535","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:10:29.129023Z","signature_b64":"unYgJxDGMAX/HX8z0bXub+BtSP2d2R9IWOliCg6kf4GZBW+aKaE2/mGpIRipl1qJkrhVzdFlYfVCJkEQ3GYSAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"26019bf2b30ff997926225db2e7a15c36993a2537c7d1253d14074386ca38535","last_reissued_at":"2026-07-05T08:10:29.128564Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:10:29.128564Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2404.13210","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":"2026-07-05T08:10:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gSbBCAsiwbadCW5CgA83DcFxHBLXfJ7KL27Bxca4L7t8WYFojsHeHWgJ8CbCA7V2eKJRG1zLSswIhvIJRCaxAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T14:27:39.617936Z"},"content_sha256":"c039c8288fd837d9e627b03ac8eb94c77695d07fd5bdf4c4c6680d842810d1bb","schema_version":"1.0","event_id":"sha256:c039c8288fd837d9e627b03ac8eb94c77695d07fd5bdf4c4c6680d842810d1bb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:EYAZX4VTB74ZPETCEXNS46QVYN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Laser cooling $^{88}$Sr to microkelvin temperature with an integrated-photonics system","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"physics.atom-ph","authors_text":"Akash Rakholia, Amit Agrawal, Andrew R. Ferdinand, Daniel Sheredy, Grisha Spektor, Martin M. Boyd, Okan Koksal, Parth B. Patel, Scott B. Papp, Sindhu Jammi, Travis C. Briles, Wenqi Zhu, William Lunden, Zachary Newman, Zheng Luo","submitted_at":"2024-04-19T23:17:37Z","abstract_excerpt":"We report on experiments generating a magneto-optical trap (MOT) of 88-strontium ($^{88}$Sr) atoms at microkelvin temperature, using integrated-photonics devices. With metasurface optics integrated on a fused-silica substrate, we generate six-beam, circularly polarized, counter-propagating MOTs on the blue broad-line, 461 nm, and red narrow-line, 689 nm, Sr cooling transitions without bulk optics. By use of a diverging beam configuration, we create up to 10 mm diameter MOT beams at the trapping location. To frequency stabilize and linewidth narrow the cooling lasers, we use fiber-packaged, int"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.13210","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2404.13210/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T08:10:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Lq5Ls3QUoHiw7Efht0nbyqB3m6xCCViJb6zmICwlM6PVzGggswplHtj9MBqtq7oFbzF3rrvAfFGUcsKqmA2OAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T14:27:39.618456Z"},"content_sha256":"81766b5dfd8c5ba91f5de0813922defbbd312f10f4eaac33d07818e57959ad24","schema_version":"1.0","event_id":"sha256:81766b5dfd8c5ba91f5de0813922defbbd312f10f4eaac33d07818e57959ad24"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EYAZX4VTB74ZPETCEXNS46QVYN/bundle.json","state_url":"https://pith.science/pith/EYAZX4VTB74ZPETCEXNS46QVYN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EYAZX4VTB74ZPETCEXNS46QVYN/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":"2026-08-05T14:27:39Z","links":{"resolver":"https://pith.science/pith/EYAZX4VTB74ZPETCEXNS46QVYN","bundle":"https://pith.science/pith/EYAZX4VTB74ZPETCEXNS46QVYN/bundle.json","state":"https://pith.science/pith/EYAZX4VTB74ZPETCEXNS46QVYN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EYAZX4VTB74ZPETCEXNS46QVYN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:EYAZX4VTB74ZPETCEXNS46QVYN","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":"7c9b414b6c2b7002e55a833094cd1b1cf3a1af0068638668a38ed1ed90d00d9e","cross_cats_sorted":["quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2024-04-19T23:17:37Z","title_canon_sha256":"3b691629d45cb08cf0ba0ffecab8078945f33c4b1fabe5d7d260b8c9894c8635"},"schema_version":"1.0","source":{"id":"2404.13210","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2404.13210","created_at":"2026-07-05T08:10:29Z"},{"alias_kind":"arxiv_version","alias_value":"2404.13210v1","created_at":"2026-07-05T08:10:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.13210","created_at":"2026-07-05T08:10:29Z"},{"alias_kind":"pith_short_12","alias_value":"EYAZX4VTB74Z","created_at":"2026-07-05T08:10:29Z"},{"alias_kind":"pith_short_16","alias_value":"EYAZX4VTB74ZPETC","created_at":"2026-07-05T08:10:29Z"},{"alias_kind":"pith_short_8","alias_value":"EYAZX4VT","created_at":"2026-07-05T08:10:29Z"}],"graph_snapshots":[{"event_id":"sha256:81766b5dfd8c5ba91f5de0813922defbbd312f10f4eaac33d07818e57959ad24","target":"graph","created_at":"2026-07-05T08:10:29Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2404.13210/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report on experiments generating a magneto-optical trap (MOT) of 88-strontium ($^{88}$Sr) atoms at microkelvin temperature, using integrated-photonics devices. With metasurface optics integrated on a fused-silica substrate, we generate six-beam, circularly polarized, counter-propagating MOTs on the blue broad-line, 461 nm, and red narrow-line, 689 nm, Sr cooling transitions without bulk optics. By use of a diverging beam configuration, we create up to 10 mm diameter MOT beams at the trapping location. To frequency stabilize and linewidth narrow the cooling lasers, we use fiber-packaged, int","authors_text":"Akash Rakholia, Amit Agrawal, Andrew R. Ferdinand, Daniel Sheredy, Grisha Spektor, Martin M. Boyd, Okan Koksal, Parth B. Patel, Scott B. Papp, Sindhu Jammi, Travis C. Briles, Wenqi Zhu, William Lunden, Zachary Newman, Zheng Luo","cross_cats":["quant-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2024-04-19T23:17:37Z","title":"Laser cooling $^{88}$Sr to microkelvin temperature with an integrated-photonics system"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.13210","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:c039c8288fd837d9e627b03ac8eb94c77695d07fd5bdf4c4c6680d842810d1bb","target":"record","created_at":"2026-07-05T08:10:29Z","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":"7c9b414b6c2b7002e55a833094cd1b1cf3a1af0068638668a38ed1ed90d00d9e","cross_cats_sorted":["quant-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.atom-ph","submitted_at":"2024-04-19T23:17:37Z","title_canon_sha256":"3b691629d45cb08cf0ba0ffecab8078945f33c4b1fabe5d7d260b8c9894c8635"},"schema_version":"1.0","source":{"id":"2404.13210","kind":"arxiv","version":1}},"canonical_sha256":"26019bf2b30ff997926225db2e7a15c36993a2537c7d1253d14074386ca38535","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"26019bf2b30ff997926225db2e7a15c36993a2537c7d1253d14074386ca38535","first_computed_at":"2026-07-05T08:10:29.128564Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:10:29.128564Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"unYgJxDGMAX/HX8z0bXub+BtSP2d2R9IWOliCg6kf4GZBW+aKaE2/mGpIRipl1qJkrhVzdFlYfVCJkEQ3GYSAw==","signature_status":"signed_v1","signed_at":"2026-07-05T08:10:29.129023Z","signed_message":"canonical_sha256_bytes"},"source_id":"2404.13210","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c039c8288fd837d9e627b03ac8eb94c77695d07fd5bdf4c4c6680d842810d1bb","sha256:81766b5dfd8c5ba91f5de0813922defbbd312f10f4eaac33d07818e57959ad24"],"state_sha256":"53b356c0d5472a6b37a8752f14a608a9885cab561ca1bd5c16b679beb6f7cd5a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9+ohobgtJlkc2cUDL50a11s7YMe8b6Oz5n+I5yEXVGZTZtvHs9+z/CSS8TMIM4Hwgmcg7IK96sE3qIbEabzfBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T14:27:39.625007Z","bundle_sha256":"30e53b26b4198ae712c3f26cdcb0509b0aa34037461ee3819c0f8d7d2a729ec4"}}