{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:TFFW7OMNX2Q2C27V7YZE2XV2WE","short_pith_number":"pith:TFFW7OMN","schema_version":"1.0","canonical_sha256":"994b6fb98dbea1a16bf5fe324d5ebab100c07e7877b9e4b4d4ea58f3bce8a59e","source":{"kind":"arxiv","id":"2402.10746","version":2},"attestation_state":"computed","paper":{"title":"Spin projection noise and the magnetic sensitivity of optically pumped magnetometers","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"G. Vasilakis, I. K. Kominis, K. Mouloudakis, M. W. Mitchell, V. Koutrouli","submitted_at":"2024-02-16T15:11:46Z","abstract_excerpt":"Present protocols for obtaining the ultimate magnetic sensitivity of optically pumped magnetometers (OPMs) utilizing alkali-metal ensembles rely on uncorrelated atoms in stretched states. A new approach for calculating the spin projection noise (SPN)-limited signal to noise ratio (SNR) and the magnetic sensitivity of OPMs is proposed. Our model is based solely on the mean-field density matrix dynamics and in contrast to previous models, it applies to both low and high field regimes, it takes into account the degree of spin polarization, the intra- and interhyperfine correlations, the decoheren"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2402.10746","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2024-02-16T15:11:46Z","cross_cats_sorted":[],"title_canon_sha256":"c459a069fbd0cf7f7a836cac54e68522170b484b6215e07b61b9a2ea3b95b844","abstract_canon_sha256":"e4926ab8040e53c311cbcd6fec0843f01fb1900f1f6bbb20862b3272b448a39f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:48:03.771124Z","signature_b64":"0WT/LwEhzdzTQ+2nRJA4tMhG1EU2CdOJZ8qVG7T/3DWzjnQokwuWVSo3Y/fT53IdxYJfjcSqW5lh1E6WzeI2DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"994b6fb98dbea1a16bf5fe324d5ebab100c07e7877b9e4b4d4ea58f3bce8a59e","last_reissued_at":"2026-07-05T07:48:03.770625Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:48:03.770625Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Spin projection noise and the magnetic sensitivity of optically pumped magnetometers","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"G. Vasilakis, I. K. Kominis, K. Mouloudakis, M. W. Mitchell, V. Koutrouli","submitted_at":"2024-02-16T15:11:46Z","abstract_excerpt":"Present protocols for obtaining the ultimate magnetic sensitivity of optically pumped magnetometers (OPMs) utilizing alkali-metal ensembles rely on uncorrelated atoms in stretched states. A new approach for calculating the spin projection noise (SPN)-limited signal to noise ratio (SNR) and the magnetic sensitivity of OPMs is proposed. Our model is based solely on the mean-field density matrix dynamics and in contrast to previous models, it applies to both low and high field regimes, it takes into account the degree of spin polarization, the intra- and interhyperfine correlations, the decoheren"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2402.10746","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2402.10746/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2402.10746","created_at":"2026-07-05T07:48:03.770680+00:00"},{"alias_kind":"arxiv_version","alias_value":"2402.10746v2","created_at":"2026-07-05T07:48:03.770680+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2402.10746","created_at":"2026-07-05T07:48:03.770680+00:00"},{"alias_kind":"pith_short_12","alias_value":"TFFW7OMNX2Q2","created_at":"2026-07-05T07:48:03.770680+00:00"},{"alias_kind":"pith_short_16","alias_value":"TFFW7OMNX2Q2C27V","created_at":"2026-07-05T07:48:03.770680+00:00"},{"alias_kind":"pith_short_8","alias_value":"TFFW7OMN","created_at":"2026-07-05T07:48:03.770680+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2605.31262","citing_title":"Non-linear density scaling of spin noise reveals atomic correlations in warm vapors","ref_index":33,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/TFFW7OMNX2Q2C27V7YZE2XV2WE","json":"https://pith.science/pith/TFFW7OMNX2Q2C27V7YZE2XV2WE.json","graph_json":"https://pith.science/api/pith-number/TFFW7OMNX2Q2C27V7YZE2XV2WE/graph.json","events_json":"https://pith.science/api/pith-number/TFFW7OMNX2Q2C27V7YZE2XV2WE/events.json","paper":"https://pith.science/paper/TFFW7OMN"},"agent_actions":{"view_html":"https://pith.science/pith/TFFW7OMNX2Q2C27V7YZE2XV2WE","download_json":"https://pith.science/pith/TFFW7OMNX2Q2C27V7YZE2XV2WE.json","view_paper":"https://pith.science/paper/TFFW7OMN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2402.10746&json=true","fetch_graph":"https://pith.science/api/pith-number/TFFW7OMNX2Q2C27V7YZE2XV2WE/graph.json","fetch_events":"https://pith.science/api/pith-number/TFFW7OMNX2Q2C27V7YZE2XV2WE/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/TFFW7OMNX2Q2C27V7YZE2XV2WE/action/timestamp_anchor","attest_storage":"https://pith.science/pith/TFFW7OMNX2Q2C27V7YZE2XV2WE/action/storage_attestation","attest_author":"https://pith.science/pith/TFFW7OMNX2Q2C27V7YZE2XV2WE/action/author_attestation","sign_citation":"https://pith.science/pith/TFFW7OMNX2Q2C27V7YZE2XV2WE/action/citation_signature","submit_replication":"https://pith.science/pith/TFFW7OMNX2Q2C27V7YZE2XV2WE/action/replication_record"}},"created_at":"2026-07-05T07:48:03.770680+00:00","updated_at":"2026-07-05T07:48:03.770680+00:00"}