{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:HLJHKXT4S2TFJNWYS67ZII4EBN","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":"76937b425c6f961040401dd3efc4ba18059fb520ea6a3ec038371f1c0a2f8441","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2008-12-12T08:22:29Z","title_canon_sha256":"21f3d9108a6546493bd61a0f07fe05d31346cde7c6332a42985167dc11fef8f7"},"schema_version":"1.0","source":{"id":"0812.2310","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0812.2310","created_at":"2026-05-18T02:15:10Z"},{"alias_kind":"arxiv_version","alias_value":"0812.2310v3","created_at":"2026-05-18T02:15:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0812.2310","created_at":"2026-05-18T02:15:10Z"},{"alias_kind":"pith_short_12","alias_value":"HLJHKXT4S2TF","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"HLJHKXT4S2TFJNWY","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"HLJHKXT4","created_at":"2026-05-18T12:25:57Z"}],"graph_snapshots":[{"event_id":"sha256:7f5ffc72f6c20cbfc7a3835afb3b027363b66a81a4afe194f23e40cc5d82960c","target":"graph","created_at":"2026-05-18T02:15:10Z","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 results on a free-space atom interferometer operating on the first order magnetically insensitive |F=1,mF=0> -> |F=2,mF=0> transition of Bose-condensed 87Rb atoms. A pulsed atom laser is output-coupled from a Bose-Einstein condensate and propagates through a sequence of two internal state beam splitters, realized via coherent Raman transitions between the two interfering states. We observe Ramsey fringes with a visibility close to 100% and determine the current and the potentially achievable interferometric phase sensitivity. This system is well suited to testing recent proposals fo","authors_text":"C. Figl, D. D\\\"oring, J. D. Close, J. E. Debs, N. P. Robins, P. A. Altin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2008-12-12T08:22:29Z","title":"Ramsey interferometry with an atom laser"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0812.2310","kind":"arxiv","version":3},"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:fad4fea925113d7435ffb25cbb92d54963fee7f66a51cc81a5d7aa4d2027c8e9","target":"record","created_at":"2026-05-18T02:15:10Z","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":"76937b425c6f961040401dd3efc4ba18059fb520ea6a3ec038371f1c0a2f8441","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2008-12-12T08:22:29Z","title_canon_sha256":"21f3d9108a6546493bd61a0f07fe05d31346cde7c6332a42985167dc11fef8f7"},"schema_version":"1.0","source":{"id":"0812.2310","kind":"arxiv","version":3}},"canonical_sha256":"3ad2755e7c96a654b6d897bf9423840b5229876b7c8a0020fbe2e08b7da91da2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3ad2755e7c96a654b6d897bf9423840b5229876b7c8a0020fbe2e08b7da91da2","first_computed_at":"2026-05-18T02:15:10.708873Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:15:10.708873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"44wB2BeRIgTcEidS8hPKv5+Lkeo6q/mGOIKXo+YX1sz8FIUSOU5YfaJEN7WVJUMTeeLSi/kgDCPYuNHQrmuqBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:15:10.709547Z","signed_message":"canonical_sha256_bytes"},"source_id":"0812.2310","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fad4fea925113d7435ffb25cbb92d54963fee7f66a51cc81a5d7aa4d2027c8e9","sha256:7f5ffc72f6c20cbfc7a3835afb3b027363b66a81a4afe194f23e40cc5d82960c"],"state_sha256":"373281b1a35f6a1686e8e51a2499b70c0caaef91835050ead5b42fc5c731f1c3"}