{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:6NAOVTB3II7QJG5IZTIBTJB3FA","short_pith_number":"pith:6NAOVTB3","canonical_record":{"source":{"id":"1002.3549","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2010-02-18T15:43:13Z","cross_cats_sorted":[],"title_canon_sha256":"5d34bdeaca12f9906270ef3c3156403884991e8dc70ce23b902c60ff5ee1ee34","abstract_canon_sha256":"78b372ce84669d21d55049479a03526e7505647a3aebaf8bedd0a9f928aae4f5"},"schema_version":"1.0"},"canonical_sha256":"f340eacc3b423f049ba8ccd019a43b2818b881c01bbfe20f3000e3534806a7e9","source":{"kind":"arxiv","id":"1002.3549","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.3549","created_at":"2026-05-18T02:33:47Z"},{"alias_kind":"arxiv_version","alias_value":"1002.3549v1","created_at":"2026-05-18T02:33:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.3549","created_at":"2026-05-18T02:33:47Z"},{"alias_kind":"pith_short_12","alias_value":"6NAOVTB3II7Q","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_16","alias_value":"6NAOVTB3II7QJG5I","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_8","alias_value":"6NAOVTB3","created_at":"2026-05-18T12:26:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:6NAOVTB3II7QJG5IZTIBTJB3FA","target":"record","payload":{"canonical_record":{"source":{"id":"1002.3549","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2010-02-18T15:43:13Z","cross_cats_sorted":[],"title_canon_sha256":"5d34bdeaca12f9906270ef3c3156403884991e8dc70ce23b902c60ff5ee1ee34","abstract_canon_sha256":"78b372ce84669d21d55049479a03526e7505647a3aebaf8bedd0a9f928aae4f5"},"schema_version":"1.0"},"canonical_sha256":"f340eacc3b423f049ba8ccd019a43b2818b881c01bbfe20f3000e3534806a7e9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:33:47.852561Z","signature_b64":"OC5qzSvfuaWgAPAbIrdkaJ9ayO061YIPcqRXE54qOFqHPfpfKT5kvDimUygv6m1UPAXwWQUVmSlGsJfouZieDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f340eacc3b423f049ba8ccd019a43b2818b881c01bbfe20f3000e3534806a7e9","last_reissued_at":"2026-05-18T02:33:47.851988Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:33:47.851988Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1002.3549","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":"2026-05-18T02:33:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CtiPINtiUCPs8qUn3lOnq8qDYn4HVotGQ8cmZ6BNivXDkJZzDvWpOh9nJo+MC1IAzaiRMsUM0aB3OGgGtCgQCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T02:51:05.233135Z"},"content_sha256":"44cde453dbc49ef90e58da83068fc11bdb4dbb0b4c523144d7fa86467f8cde94","schema_version":"1.0","event_id":"sha256:44cde453dbc49ef90e58da83068fc11bdb4dbb0b4c523144d7fa86467f8cde94"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:6NAOVTB3II7QJG5IZTIBTJB3FA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Sensitive gravity-gradiometry with atom interferometry: progress towards an improved determination of the gravitational constant","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"F. Sorrentino, G. M. Tino, G. Rosi, L. Cacciapuoti, M. Prevedelli, Y.-H. Lien","submitted_at":"2010-02-18T15:43:13Z","abstract_excerpt":"We here present a high sensitivity gravity-gradiometer based on atom interferometry. In our apparatus, two clouds of laser-cooled rubidium atoms are launched in fountain configuration and interrogated by a Raman interferometry sequence to probe the gradient of gravity field. We recently implemented a high-flux atomic source and a newly designed Raman lasers system in the instrument set-up. We discuss the applications towards a precise determination of the Newtonian gravitational constant G. The long-term stability of the instrument and the signal-to-noise ratio demonstrated here open interesti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.3549","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":""},"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":"2026-05-18T02:33:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t8FOcJlAnKKyzNOHOhA7FITJK1d/UnPbomVnBS+Z5I+WnQz4EKoDPeg5dfJQuLVRUgr56x9grgW400iielPXCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T02:51:05.233931Z"},"content_sha256":"34ed2b780861bbb7e0caa6b09364ce685a7d7f6fe18b285bbfee541a2ffb815c","schema_version":"1.0","event_id":"sha256:34ed2b780861bbb7e0caa6b09364ce685a7d7f6fe18b285bbfee541a2ffb815c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6NAOVTB3II7QJG5IZTIBTJB3FA/bundle.json","state_url":"https://pith.science/pith/6NAOVTB3II7QJG5IZTIBTJB3FA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6NAOVTB3II7QJG5IZTIBTJB3FA/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":"2026-05-31T02:51:05Z","links":{"resolver":"https://pith.science/pith/6NAOVTB3II7QJG5IZTIBTJB3FA","bundle":"https://pith.science/pith/6NAOVTB3II7QJG5IZTIBTJB3FA/bundle.json","state":"https://pith.science/pith/6NAOVTB3II7QJG5IZTIBTJB3FA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6NAOVTB3II7QJG5IZTIBTJB3FA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:6NAOVTB3II7QJG5IZTIBTJB3FA","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":"78b372ce84669d21d55049479a03526e7505647a3aebaf8bedd0a9f928aae4f5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2010-02-18T15:43:13Z","title_canon_sha256":"5d34bdeaca12f9906270ef3c3156403884991e8dc70ce23b902c60ff5ee1ee34"},"schema_version":"1.0","source":{"id":"1002.3549","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.3549","created_at":"2026-05-18T02:33:47Z"},{"alias_kind":"arxiv_version","alias_value":"1002.3549v1","created_at":"2026-05-18T02:33:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.3549","created_at":"2026-05-18T02:33:47Z"},{"alias_kind":"pith_short_12","alias_value":"6NAOVTB3II7Q","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_16","alias_value":"6NAOVTB3II7QJG5I","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_8","alias_value":"6NAOVTB3","created_at":"2026-05-18T12:26:04Z"}],"graph_snapshots":[{"event_id":"sha256:34ed2b780861bbb7e0caa6b09364ce685a7d7f6fe18b285bbfee541a2ffb815c","target":"graph","created_at":"2026-05-18T02:33:47Z","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 here present a high sensitivity gravity-gradiometer based on atom interferometry. In our apparatus, two clouds of laser-cooled rubidium atoms are launched in fountain configuration and interrogated by a Raman interferometry sequence to probe the gradient of gravity field. We recently implemented a high-flux atomic source and a newly designed Raman lasers system in the instrument set-up. We discuss the applications towards a precise determination of the Newtonian gravitational constant G. The long-term stability of the instrument and the signal-to-noise ratio demonstrated here open interesti","authors_text":"F. Sorrentino, G. M. Tino, G. Rosi, L. Cacciapuoti, M. Prevedelli, Y.-H. Lien","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2010-02-18T15:43:13Z","title":"Sensitive gravity-gradiometry with atom interferometry: progress towards an improved determination of the gravitational constant"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.3549","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":"sha256:44cde453dbc49ef90e58da83068fc11bdb4dbb0b4c523144d7fa86467f8cde94","target":"record","created_at":"2026-05-18T02:33:47Z","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":"78b372ce84669d21d55049479a03526e7505647a3aebaf8bedd0a9f928aae4f5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2010-02-18T15:43:13Z","title_canon_sha256":"5d34bdeaca12f9906270ef3c3156403884991e8dc70ce23b902c60ff5ee1ee34"},"schema_version":"1.0","source":{"id":"1002.3549","kind":"arxiv","version":1}},"canonical_sha256":"f340eacc3b423f049ba8ccd019a43b2818b881c01bbfe20f3000e3534806a7e9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f340eacc3b423f049ba8ccd019a43b2818b881c01bbfe20f3000e3534806a7e9","first_computed_at":"2026-05-18T02:33:47.851988Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:33:47.851988Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OC5qzSvfuaWgAPAbIrdkaJ9ayO061YIPcqRXE54qOFqHPfpfKT5kvDimUygv6m1UPAXwWQUVmSlGsJfouZieDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:33:47.852561Z","signed_message":"canonical_sha256_bytes"},"source_id":"1002.3549","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:44cde453dbc49ef90e58da83068fc11bdb4dbb0b4c523144d7fa86467f8cde94","sha256:34ed2b780861bbb7e0caa6b09364ce685a7d7f6fe18b285bbfee541a2ffb815c"],"state_sha256":"176f6b54d84490bb36d6914abf816b4d30cd235301e0048138df5cfa323b6479"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"69zyxqqYbCedUfGprLnTnOMuSDzGms7abhu587Bms4xrVAVI1gnzeYmhYbS++7Y6i+QAp6YKSympJz2sw2PECA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T02:51:05.238131Z","bundle_sha256":"89fad0d2f7e9bee926f1666c7351ad09584b0803e966e9e0e28e6d498aa23ba4"}}