{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:NFCR7K44I4P3XSQD46D6UNR4H3","short_pith_number":"pith:NFCR7K44","schema_version":"1.0","canonical_sha256":"69451fab9c471fbbca03e787ea363c3eebc8ec601bf70f673754f4a138310624","source":{"kind":"arxiv","id":"0912.5147","version":1},"attestation_state":"computed","paper":{"title":"Systematic errors in the correlation method for Johnson noise thermometry: residual correlations due to amplifiers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"Luca Callegaro, Marco Pisani, Massimo Ortolano","submitted_at":"2009-12-28T10:11:27Z","abstract_excerpt":"Johnson noise thermometers (JNT) measure the equilibrium electrical noise, proportional to thermodynamic temperature, of a sensing resistor. In the correlation method, the same resistor is connected to two amplifiers and a correlation of their outputs is performed, in order to reject amplifiers' noise. Such rejection is not perfect: the residual correlation gives a systematic error in the JNT reading. In order to put an upper limit, or to achieve a correction, for such error, a careful electrical modelling of the amplifiers and connections must be performed. Standard numerical simulation tools"},"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":"0912.5147","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2009-12-28T10:11:27Z","cross_cats_sorted":[],"title_canon_sha256":"4f78fc49ca35d3921c107708dedf05813a0651b5bdc8daa8180b739d9fb1e236","abstract_canon_sha256":"5bed82c29dc41a887244c0530f8d45f86525e49e12597b756fff2dbdbd008c4d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:10:13.487226Z","signature_b64":"tl+7F6imdlJEErBjlVUX31CAiafYan/VARn2tneXJ7nz7xHlUViQPOuLdbwE7OYGdc6CHPAQrnQ6yX4LQtZyDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"69451fab9c471fbbca03e787ea363c3eebc8ec601bf70f673754f4a138310624","last_reissued_at":"2026-05-18T02:10:13.486613Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:10:13.486613Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Systematic errors in the correlation method for Johnson noise thermometry: residual correlations due to amplifiers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"Luca Callegaro, Marco Pisani, Massimo Ortolano","submitted_at":"2009-12-28T10:11:27Z","abstract_excerpt":"Johnson noise thermometers (JNT) measure the equilibrium electrical noise, proportional to thermodynamic temperature, of a sensing resistor. In the correlation method, the same resistor is connected to two amplifiers and a correlation of their outputs is performed, in order to reject amplifiers' noise. Such rejection is not perfect: the residual correlation gives a systematic error in the JNT reading. In order to put an upper limit, or to achieve a correction, for such error, a careful electrical modelling of the amplifiers and connections must be performed. Standard numerical simulation tools"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.5147","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0912.5147","created_at":"2026-05-18T02:10:13.486703+00:00"},{"alias_kind":"arxiv_version","alias_value":"0912.5147v1","created_at":"2026-05-18T02:10:13.486703+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.5147","created_at":"2026-05-18T02:10:13.486703+00:00"},{"alias_kind":"pith_short_12","alias_value":"NFCR7K44I4P3","created_at":"2026-05-18T12:26:00.592388+00:00"},{"alias_kind":"pith_short_16","alias_value":"NFCR7K44I4P3XSQD","created_at":"2026-05-18T12:26:00.592388+00:00"},{"alias_kind":"pith_short_8","alias_value":"NFCR7K44","created_at":"2026-05-18T12:26:00.592388+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/NFCR7K44I4P3XSQD46D6UNR4H3","json":"https://pith.science/pith/NFCR7K44I4P3XSQD46D6UNR4H3.json","graph_json":"https://pith.science/api/pith-number/NFCR7K44I4P3XSQD46D6UNR4H3/graph.json","events_json":"https://pith.science/api/pith-number/NFCR7K44I4P3XSQD46D6UNR4H3/events.json","paper":"https://pith.science/paper/NFCR7K44"},"agent_actions":{"view_html":"https://pith.science/pith/NFCR7K44I4P3XSQD46D6UNR4H3","download_json":"https://pith.science/pith/NFCR7K44I4P3XSQD46D6UNR4H3.json","view_paper":"https://pith.science/paper/NFCR7K44","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0912.5147&json=true","fetch_graph":"https://pith.science/api/pith-number/NFCR7K44I4P3XSQD46D6UNR4H3/graph.json","fetch_events":"https://pith.science/api/pith-number/NFCR7K44I4P3XSQD46D6UNR4H3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NFCR7K44I4P3XSQD46D6UNR4H3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NFCR7K44I4P3XSQD46D6UNR4H3/action/storage_attestation","attest_author":"https://pith.science/pith/NFCR7K44I4P3XSQD46D6UNR4H3/action/author_attestation","sign_citation":"https://pith.science/pith/NFCR7K44I4P3XSQD46D6UNR4H3/action/citation_signature","submit_replication":"https://pith.science/pith/NFCR7K44I4P3XSQD46D6UNR4H3/action/replication_record"}},"created_at":"2026-05-18T02:10:13.486703+00:00","updated_at":"2026-05-18T02:10:13.486703+00:00"}