{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:56SLQ4OBMSZGTOTFOKDCP6JB2S","short_pith_number":"pith:56SLQ4OB","schema_version":"1.0","canonical_sha256":"efa4b871c164b269ba65728627f921d4b8267c338a26220adf6b4fa8164d0e5c","source":{"kind":"arxiv","id":"1208.6547","version":2},"attestation_state":"computed","paper":{"title":"Cosmological Ohm's law and dynamics of non-minimal electromagnetism","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Federico R. Urban, Lukas Hollenstein, Rajeev Kumar Jain","submitted_at":"2012-08-31T16:50:48Z","abstract_excerpt":"The origin of large-scale magnetic fields in cosmic structures and the intergalactic medium is still poorly understood. We explore the effects of non-minimal couplings of electromagnetism on the cosmological evolution of currents and magnetic fields. In this context, we revisit the mildly non-linear plasma dynamics around recombination that are known to generate weak magnetic fields. We use the covariant approach to obtain a fully general and non-linear evolution equation for the plasma currents and derive a generalised Ohm law valid on large scales as well as in the presence of non-minimal co"},"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":"1208.6547","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-08-31T16:50:48Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"fdceba8452b88593d6aad58966284825bf257b90cadddab39f7c86639561f920","abstract_canon_sha256":"d7de26c31640ca2a81f6f0fe1b1027553ce8088a1aece891f0d16f9ea2da6962"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:36:56.398613Z","signature_b64":"EqtqXpzVhqa4SBdyW2/smC38z+5hYTFyNiWJ5Lk72GvUOyEk7gTFBGJP3vELP+Om3I/gcMrMKL30dz4uUZE3CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"efa4b871c164b269ba65728627f921d4b8267c338a26220adf6b4fa8164d0e5c","last_reissued_at":"2026-05-18T03:36:56.397922Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:36:56.397922Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Cosmological Ohm's law and dynamics of non-minimal electromagnetism","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Federico R. Urban, Lukas Hollenstein, Rajeev Kumar Jain","submitted_at":"2012-08-31T16:50:48Z","abstract_excerpt":"The origin of large-scale magnetic fields in cosmic structures and the intergalactic medium is still poorly understood. We explore the effects of non-minimal couplings of electromagnetism on the cosmological evolution of currents and magnetic fields. In this context, we revisit the mildly non-linear plasma dynamics around recombination that are known to generate weak magnetic fields. We use the covariant approach to obtain a fully general and non-linear evolution equation for the plasma currents and derive a generalised Ohm law valid on large scales as well as in the presence of non-minimal co"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.6547","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1208.6547","created_at":"2026-05-18T03:36:56.398041+00:00"},{"alias_kind":"arxiv_version","alias_value":"1208.6547v2","created_at":"2026-05-18T03:36:56.398041+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.6547","created_at":"2026-05-18T03:36:56.398041+00:00"},{"alias_kind":"pith_short_12","alias_value":"56SLQ4OBMSZG","created_at":"2026-05-18T12:26:53.410803+00:00"},{"alias_kind":"pith_short_16","alias_value":"56SLQ4OBMSZGTOTF","created_at":"2026-05-18T12:26:53.410803+00:00"},{"alias_kind":"pith_short_8","alias_value":"56SLQ4OB","created_at":"2026-05-18T12:26:53.410803+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/56SLQ4OBMSZGTOTFOKDCP6JB2S","json":"https://pith.science/pith/56SLQ4OBMSZGTOTFOKDCP6JB2S.json","graph_json":"https://pith.science/api/pith-number/56SLQ4OBMSZGTOTFOKDCP6JB2S/graph.json","events_json":"https://pith.science/api/pith-number/56SLQ4OBMSZGTOTFOKDCP6JB2S/events.json","paper":"https://pith.science/paper/56SLQ4OB"},"agent_actions":{"view_html":"https://pith.science/pith/56SLQ4OBMSZGTOTFOKDCP6JB2S","download_json":"https://pith.science/pith/56SLQ4OBMSZGTOTFOKDCP6JB2S.json","view_paper":"https://pith.science/paper/56SLQ4OB","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1208.6547&json=true","fetch_graph":"https://pith.science/api/pith-number/56SLQ4OBMSZGTOTFOKDCP6JB2S/graph.json","fetch_events":"https://pith.science/api/pith-number/56SLQ4OBMSZGTOTFOKDCP6JB2S/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/56SLQ4OBMSZGTOTFOKDCP6JB2S/action/timestamp_anchor","attest_storage":"https://pith.science/pith/56SLQ4OBMSZGTOTFOKDCP6JB2S/action/storage_attestation","attest_author":"https://pith.science/pith/56SLQ4OBMSZGTOTFOKDCP6JB2S/action/author_attestation","sign_citation":"https://pith.science/pith/56SLQ4OBMSZGTOTFOKDCP6JB2S/action/citation_signature","submit_replication":"https://pith.science/pith/56SLQ4OBMSZGTOTFOKDCP6JB2S/action/replication_record"}},"created_at":"2026-05-18T03:36:56.398041+00:00","updated_at":"2026-05-18T03:36:56.398041+00:00"}