{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:RHKYIP2JHI5N3XEHOKWCKA2Q2Y","short_pith_number":"pith:RHKYIP2J","canonical_record":{"source":{"id":"1907.13497","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-07-31T13:41:16Z","cross_cats_sorted":[],"title_canon_sha256":"3dd2a7633f853854a3557c9fc1654f34d0f96fdf5aaf5b101c827805a6c5c877","abstract_canon_sha256":"2dc1e2d0d9c7beb8a813b1a1566078262a1fe29ab74ea14dfcca2b4e6b752dfd"},"schema_version":"1.0"},"canonical_sha256":"89d5843f493a3adddc8772ac250350d6129e85759ff043b57010008a6b716186","source":{"kind":"arxiv","id":"1907.13497","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.13497","created_at":"2026-07-05T00:36:59Z"},{"alias_kind":"arxiv_version","alias_value":"1907.13497v1","created_at":"2026-07-05T00:36:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.13497","created_at":"2026-07-05T00:36:59Z"},{"alias_kind":"pith_short_12","alias_value":"RHKYIP2JHI5N","created_at":"2026-07-05T00:36:59Z"},{"alias_kind":"pith_short_16","alias_value":"RHKYIP2JHI5N3XEH","created_at":"2026-07-05T00:36:59Z"},{"alias_kind":"pith_short_8","alias_value":"RHKYIP2J","created_at":"2026-07-05T00:36:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:RHKYIP2JHI5N3XEHOKWCKA2Q2Y","target":"record","payload":{"canonical_record":{"source":{"id":"1907.13497","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-07-31T13:41:16Z","cross_cats_sorted":[],"title_canon_sha256":"3dd2a7633f853854a3557c9fc1654f34d0f96fdf5aaf5b101c827805a6c5c877","abstract_canon_sha256":"2dc1e2d0d9c7beb8a813b1a1566078262a1fe29ab74ea14dfcca2b4e6b752dfd"},"schema_version":"1.0"},"canonical_sha256":"89d5843f493a3adddc8772ac250350d6129e85759ff043b57010008a6b716186","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:36:59.272479Z","signature_b64":"2JeucvE185zCqpQAsN4u7oKxx0C4e/Xkyn4MARuawNXGfIObfQEhaLOD85nMqSaWCI8wGR1llteI2jVE/seuDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"89d5843f493a3adddc8772ac250350d6129e85759ff043b57010008a6b716186","last_reissued_at":"2026-07-05T00:36:59.271988Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:36:59.271988Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.13497","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":"2026-07-05T00:36:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bMD5rdE8cX3Cf8xQtS2UXCyUWdJzcvsE8qw6Kt4bsuO7ITo3CAJ3WCSN9uR5dfDPIowkUt0ZNnaLpB63Ka4uAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T09:03:59.478512Z"},"content_sha256":"b9b62edcffbeba575d20ce40102e9a072124e7ec6ba0d4f893acae9ffdc76482","schema_version":"1.0","event_id":"sha256:b9b62edcffbeba575d20ce40102e9a072124e7ec6ba0d4f893acae9ffdc76482"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:RHKYIP2JHI5N3XEHOKWCKA2Q2Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Compensation of gravity on cold atoms by a linear optical potential","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"Hidehiko Ikeda, Kosuke Shibata, Ryota Suzuki, Takuya Hirano","submitted_at":"2019-07-31T13:41:16Z","abstract_excerpt":"We demonstrate gravity compensation for an ultracold gas of $^{87}$Rb atoms with a time-averaged optical potential. The position of a far-off-resonance beam is temporally modulated with an acousto-optic deflector to efficiently produce a potential with a linear gradient independent of the atomic magnetic sublevels. We realize compensation of the gravity sag and preparation of a degenerate gas in a trap with weak vertical confinement. Optical gravity compensation will provide the opportunity to perform experiments under microgravity in a laboratory and broaden the scope of cold atom research."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.13497","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/1907.13497/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":"2026-07-05T00:36:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4ckswFJGEvJmpm/qFXjigaB3YScjeQWSqFXL3EPGCvi3+eo3cO1NQd05znE5LJt5itXOdaXJbk8QBi0G+Jh1Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T09:03:59.478887Z"},"content_sha256":"b39d3ddece00fb43acb277c966454d845793aee3885dc672a8599f22738c0736","schema_version":"1.0","event_id":"sha256:b39d3ddece00fb43acb277c966454d845793aee3885dc672a8599f22738c0736"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RHKYIP2JHI5N3XEHOKWCKA2Q2Y/bundle.json","state_url":"https://pith.science/pith/RHKYIP2JHI5N3XEHOKWCKA2Q2Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RHKYIP2JHI5N3XEHOKWCKA2Q2Y/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":"2026-07-07T09:03:59Z","links":{"resolver":"https://pith.science/pith/RHKYIP2JHI5N3XEHOKWCKA2Q2Y","bundle":"https://pith.science/pith/RHKYIP2JHI5N3XEHOKWCKA2Q2Y/bundle.json","state":"https://pith.science/pith/RHKYIP2JHI5N3XEHOKWCKA2Q2Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RHKYIP2JHI5N3XEHOKWCKA2Q2Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:RHKYIP2JHI5N3XEHOKWCKA2Q2Y","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":"2dc1e2d0d9c7beb8a813b1a1566078262a1fe29ab74ea14dfcca2b4e6b752dfd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-07-31T13:41:16Z","title_canon_sha256":"3dd2a7633f853854a3557c9fc1654f34d0f96fdf5aaf5b101c827805a6c5c877"},"schema_version":"1.0","source":{"id":"1907.13497","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.13497","created_at":"2026-07-05T00:36:59Z"},{"alias_kind":"arxiv_version","alias_value":"1907.13497v1","created_at":"2026-07-05T00:36:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.13497","created_at":"2026-07-05T00:36:59Z"},{"alias_kind":"pith_short_12","alias_value":"RHKYIP2JHI5N","created_at":"2026-07-05T00:36:59Z"},{"alias_kind":"pith_short_16","alias_value":"RHKYIP2JHI5N3XEH","created_at":"2026-07-05T00:36:59Z"},{"alias_kind":"pith_short_8","alias_value":"RHKYIP2J","created_at":"2026-07-05T00:36:59Z"}],"graph_snapshots":[{"event_id":"sha256:b39d3ddece00fb43acb277c966454d845793aee3885dc672a8599f22738c0736","target":"graph","created_at":"2026-07-05T00:36:59Z","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/1907.13497/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We demonstrate gravity compensation for an ultracold gas of $^{87}$Rb atoms with a time-averaged optical potential. The position of a far-off-resonance beam is temporally modulated with an acousto-optic deflector to efficiently produce a potential with a linear gradient independent of the atomic magnetic sublevels. We realize compensation of the gravity sag and preparation of a degenerate gas in a trap with weak vertical confinement. Optical gravity compensation will provide the opportunity to perform experiments under microgravity in a laboratory and broaden the scope of cold atom research.","authors_text":"Hidehiko Ikeda, Kosuke Shibata, Ryota Suzuki, Takuya Hirano","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-07-31T13:41:16Z","title":"Compensation of gravity on cold atoms by a linear optical potential"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.13497","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:b9b62edcffbeba575d20ce40102e9a072124e7ec6ba0d4f893acae9ffdc76482","target":"record","created_at":"2026-07-05T00:36:59Z","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":"2dc1e2d0d9c7beb8a813b1a1566078262a1fe29ab74ea14dfcca2b4e6b752dfd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2019-07-31T13:41:16Z","title_canon_sha256":"3dd2a7633f853854a3557c9fc1654f34d0f96fdf5aaf5b101c827805a6c5c877"},"schema_version":"1.0","source":{"id":"1907.13497","kind":"arxiv","version":1}},"canonical_sha256":"89d5843f493a3adddc8772ac250350d6129e85759ff043b57010008a6b716186","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"89d5843f493a3adddc8772ac250350d6129e85759ff043b57010008a6b716186","first_computed_at":"2026-07-05T00:36:59.271988Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:36:59.271988Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2JeucvE185zCqpQAsN4u7oKxx0C4e/Xkyn4MARuawNXGfIObfQEhaLOD85nMqSaWCI8wGR1llteI2jVE/seuDw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:36:59.272479Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.13497","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b9b62edcffbeba575d20ce40102e9a072124e7ec6ba0d4f893acae9ffdc76482","sha256:b39d3ddece00fb43acb277c966454d845793aee3885dc672a8599f22738c0736"],"state_sha256":"dbf2c942c8b4af74aeff85fa3579dd8db0e016f47bd081bf5fd0569cc55e1f3d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tZatTv/Jkx4NRuu7kLIKqGv9LLZUMHwQH5wRBxwM9LyobXYA9h6zD5sEBv0Y3+lUfYCeEgiRKSrktXp8/e/VBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T09:03:59.481810Z","bundle_sha256":"e6b8b872dbda45495e6fa3573ddde858459fb9aa8bf175665bce73f828d9d3e9"}}