{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:MZMJ2MT5Y2UAWEBKUQJ4BBRUTB","short_pith_number":"pith:MZMJ2MT5","canonical_record":{"source":{"id":"1303.2312","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2013-03-10T11:56:13Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"08d8bc9c2cd0e07a65c5a753d19f5a161411c90291344de09bac740977875960","abstract_canon_sha256":"d9a9112206dee19793486815db21b05a0548d4826b4d0c2d24189619da0d5c49"},"schema_version":"1.0"},"canonical_sha256":"66589d327dc6a80b102aa413c08634986850d09bf1009d58f32b87c5d9d64e8a","source":{"kind":"arxiv","id":"1303.2312","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.2312","created_at":"2026-05-18T03:26:42Z"},{"alias_kind":"arxiv_version","alias_value":"1303.2312v2","created_at":"2026-05-18T03:26:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.2312","created_at":"2026-05-18T03:26:42Z"},{"alias_kind":"pith_short_12","alias_value":"MZMJ2MT5Y2UA","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"MZMJ2MT5Y2UAWEBK","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"MZMJ2MT5","created_at":"2026-05-18T12:27:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:MZMJ2MT5Y2UAWEBKUQJ4BBRUTB","target":"record","payload":{"canonical_record":{"source":{"id":"1303.2312","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2013-03-10T11:56:13Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"08d8bc9c2cd0e07a65c5a753d19f5a161411c90291344de09bac740977875960","abstract_canon_sha256":"d9a9112206dee19793486815db21b05a0548d4826b4d0c2d24189619da0d5c49"},"schema_version":"1.0"},"canonical_sha256":"66589d327dc6a80b102aa413c08634986850d09bf1009d58f32b87c5d9d64e8a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:26:42.489706Z","signature_b64":"hyvLUZ8RRAlWwsp+DB8C3wiwPCCrMDKB/WVTFbcgkAJuUBDncVXXswyIBWoXk/WpdYQlzmRVP8i5gRmWEU6kCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"66589d327dc6a80b102aa413c08634986850d09bf1009d58f32b87c5d9d64e8a","last_reissued_at":"2026-05-18T03:26:42.489057Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:26:42.489057Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1303.2312","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:26:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KNU7U6G535Y4KnYXufv+LepkibyA5ipEf6B8bM5jbImo1tLPHCLSN7+iCUdEa4325PgpmX3D9hDKH1NQ21aHAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T01:33:08.104304Z"},"content_sha256":"b5f86cd250708072c8e8758865e1abec0c2c494bd3b510bf3262f03710a28b70","schema_version":"1.0","event_id":"sha256:b5f86cd250708072c8e8758865e1abec0c2c494bd3b510bf3262f03710a28b70"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:MZMJ2MT5Y2UAWEBKUQJ4BBRUTB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Real-time vector field tracking with a cold-atom magnetometer","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"physics.atom-ph","authors_text":"Ferran Martin Ciurana, Giorgio Colangelo, Mario Napolitano, Morgan W. Mitchell, Naeimeh Behbood, Robert J. Sewell","submitted_at":"2013-03-10T11:56:13Z","abstract_excerpt":"We demonstrate a fast three-axis optical magnetometer using cold, optically-trapped $^{87}$Rb gas as a sensor. By near-resonant Faraday rotation we record the free-induction decay following optical pumping along two orthogonal axes to obtain the three field components and one gradient component. A single measurement achieves shot-noise limited sub-nT sensitivity in 1 ms, with transverse spatial resolution of $\\sim$ 20 $\\mu$m. We make a detailed analysis of the shot-noise-limited sensitivity."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.2312","kind":"arxiv","version":2},"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":"2026-05-18T03:26:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OOIblICZfFaDlVY0hHmcKGu1XLeKCP4Fw4RX/gXmsj7vAuf8cARw6BW13ctELDZ/3TpxmM8v4XFo6WBWAWw7BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T01:33:08.104759Z"},"content_sha256":"303ff8d4eda687a972ecfe1c3406a00116dda5e814e997543db04e47507ce652","schema_version":"1.0","event_id":"sha256:303ff8d4eda687a972ecfe1c3406a00116dda5e814e997543db04e47507ce652"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MZMJ2MT5Y2UAWEBKUQJ4BBRUTB/bundle.json","state_url":"https://pith.science/pith/MZMJ2MT5Y2UAWEBKUQJ4BBRUTB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MZMJ2MT5Y2UAWEBKUQJ4BBRUTB/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":"2026-05-31T01:33:08Z","links":{"resolver":"https://pith.science/pith/MZMJ2MT5Y2UAWEBKUQJ4BBRUTB","bundle":"https://pith.science/pith/MZMJ2MT5Y2UAWEBKUQJ4BBRUTB/bundle.json","state":"https://pith.science/pith/MZMJ2MT5Y2UAWEBKUQJ4BBRUTB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MZMJ2MT5Y2UAWEBKUQJ4BBRUTB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:MZMJ2MT5Y2UAWEBKUQJ4BBRUTB","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":"d9a9112206dee19793486815db21b05a0548d4826b4d0c2d24189619da0d5c49","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2013-03-10T11:56:13Z","title_canon_sha256":"08d8bc9c2cd0e07a65c5a753d19f5a161411c90291344de09bac740977875960"},"schema_version":"1.0","source":{"id":"1303.2312","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.2312","created_at":"2026-05-18T03:26:42Z"},{"alias_kind":"arxiv_version","alias_value":"1303.2312v2","created_at":"2026-05-18T03:26:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.2312","created_at":"2026-05-18T03:26:42Z"},{"alias_kind":"pith_short_12","alias_value":"MZMJ2MT5Y2UA","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"MZMJ2MT5Y2UAWEBK","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"MZMJ2MT5","created_at":"2026-05-18T12:27:52Z"}],"graph_snapshots":[{"event_id":"sha256:303ff8d4eda687a972ecfe1c3406a00116dda5e814e997543db04e47507ce652","target":"graph","created_at":"2026-05-18T03:26:42Z","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 demonstrate a fast three-axis optical magnetometer using cold, optically-trapped $^{87}$Rb gas as a sensor. By near-resonant Faraday rotation we record the free-induction decay following optical pumping along two orthogonal axes to obtain the three field components and one gradient component. A single measurement achieves shot-noise limited sub-nT sensitivity in 1 ms, with transverse spatial resolution of $\\sim$ 20 $\\mu$m. We make a detailed analysis of the shot-noise-limited sensitivity.","authors_text":"Ferran Martin Ciurana, Giorgio Colangelo, Mario Napolitano, Morgan W. Mitchell, Naeimeh Behbood, Robert J. Sewell","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2013-03-10T11:56:13Z","title":"Real-time vector field tracking with a cold-atom magnetometer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.2312","kind":"arxiv","version":2},"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:b5f86cd250708072c8e8758865e1abec0c2c494bd3b510bf3262f03710a28b70","target":"record","created_at":"2026-05-18T03:26:42Z","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":"d9a9112206dee19793486815db21b05a0548d4826b4d0c2d24189619da0d5c49","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.atom-ph","submitted_at":"2013-03-10T11:56:13Z","title_canon_sha256":"08d8bc9c2cd0e07a65c5a753d19f5a161411c90291344de09bac740977875960"},"schema_version":"1.0","source":{"id":"1303.2312","kind":"arxiv","version":2}},"canonical_sha256":"66589d327dc6a80b102aa413c08634986850d09bf1009d58f32b87c5d9d64e8a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"66589d327dc6a80b102aa413c08634986850d09bf1009d58f32b87c5d9d64e8a","first_computed_at":"2026-05-18T03:26:42.489057Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:26:42.489057Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hyvLUZ8RRAlWwsp+DB8C3wiwPCCrMDKB/WVTFbcgkAJuUBDncVXXswyIBWoXk/WpdYQlzmRVP8i5gRmWEU6kCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:26:42.489706Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.2312","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b5f86cd250708072c8e8758865e1abec0c2c494bd3b510bf3262f03710a28b70","sha256:303ff8d4eda687a972ecfe1c3406a00116dda5e814e997543db04e47507ce652"],"state_sha256":"a354cca51d0182e512fa522acadfefeaed3e2bb0088f034966e6ccf4ded18c5a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s/fMimMNzOX3MWXZtG20QvXigumU3JJVU33IWEIAbuqwlO985BMM7vzCuOfz2nceGXoNuJ5iOhvBTny6lAWqDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T01:33:08.107957Z","bundle_sha256":"195c49e3af37ab352470c995c37ffa5dc3663fe91d2d15f8494123a0b647611d"}}