{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:TN3OVNYI4XXZLJB5IVKBAGLG7G","short_pith_number":"pith:TN3OVNYI","schema_version":"1.0","canonical_sha256":"9b76eab708e5ef95a43d4554101966f9ad3c6e995e3c1c7f60e77c3e408ab280","source":{"kind":"arxiv","id":"2112.09620","version":2},"attestation_state":"computed","paper":{"title":"Earth as a transducer for axion dark-matter detection","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"hep-ph","authors_text":"Ariel Arza, Derek F. Jackson Kimball, Michael A. Fedderke, Peter W. Graham, Saarik Kalia","submitted_at":"2021-12-17T16:48:11Z","abstract_excerpt":"We demonstrate that ultralight axion dark matter with a coupling to photons induces an oscillating global terrestrial magnetic field signal in the presence of the background geomagnetic field of the Earth. This signal is similar in structure to that of dark-photon dark matter that was recently pointed out and searched for in [arXiv:2106.00022] and [arXiv:2108.08852]. It has a global vectorial pattern fixed by the Earth's geomagnetic field, is temporally coherent on long time scales, and has a frequency set by the axion mass $m_a$. In this work, we both compute the detailed signal pattern, and "},"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":"2112.09620","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2021-12-17T16:48:11Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"4dbed467aedbacd5251c9860c0f7a0c68f28cd3b40fdf2718f4da19756c5b8df","abstract_canon_sha256":"65d225f7c888b11816bf31b0977bacb68633284007c6830e0d9677413905a87f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:25:50.954122Z","signature_b64":"XaLMfyq78EO4Ub4pjWyKxw8XOSJA1E8HUQqeO64zGbyJXPYcXV5Rg3ZTIq0iH+BzyrNrC9oHCr54AxSMtakoAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9b76eab708e5ef95a43d4554101966f9ad3c6e995e3c1c7f60e77c3e408ab280","last_reissued_at":"2026-07-05T04:25:50.953710Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:25:50.953710Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Earth as a transducer for axion dark-matter detection","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"hep-ph","authors_text":"Ariel Arza, Derek F. Jackson Kimball, Michael A. Fedderke, Peter W. Graham, Saarik Kalia","submitted_at":"2021-12-17T16:48:11Z","abstract_excerpt":"We demonstrate that ultralight axion dark matter with a coupling to photons induces an oscillating global terrestrial magnetic field signal in the presence of the background geomagnetic field of the Earth. This signal is similar in structure to that of dark-photon dark matter that was recently pointed out and searched for in [arXiv:2106.00022] and [arXiv:2108.08852]. It has a global vectorial pattern fixed by the Earth's geomagnetic field, is temporally coherent on long time scales, and has a frequency set by the axion mass $m_a$. In this work, we both compute the detailed signal pattern, and "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.09620","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/2112.09620/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":"2112.09620","created_at":"2026-07-05T04:25:50.953762+00:00"},{"alias_kind":"arxiv_version","alias_value":"2112.09620v2","created_at":"2026-07-05T04:25:50.953762+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.09620","created_at":"2026-07-05T04:25:50.953762+00:00"},{"alias_kind":"pith_short_12","alias_value":"TN3OVNYI4XXZ","created_at":"2026-07-05T04:25:50.953762+00:00"},{"alias_kind":"pith_short_16","alias_value":"TN3OVNYI4XXZLJB5","created_at":"2026-07-05T04:25:50.953762+00:00"},{"alias_kind":"pith_short_8","alias_value":"TN3OVNYI","created_at":"2026-07-05T04:25:50.953762+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":4,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2507.17825","citing_title":"Ultralight dark matter detection with trapped-ion interferometry","ref_index":18,"is_internal_anchor":false},{"citing_arxiv_id":"2509.15783","citing_title":"Searching for dark photon dark matter from terrestrial magnetic fields","ref_index":15,"is_internal_anchor":false},{"citing_arxiv_id":"2605.11078","citing_title":"An ultra-broadband axion dark matter experiment","ref_index":30,"is_internal_anchor":false},{"citing_arxiv_id":"2605.00549","citing_title":"Bounds on massive graviton-like particles from searches for axion-like particles coupling to photons","ref_index":75,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/TN3OVNYI4XXZLJB5IVKBAGLG7G","json":"https://pith.science/pith/TN3OVNYI4XXZLJB5IVKBAGLG7G.json","graph_json":"https://pith.science/api/pith-number/TN3OVNYI4XXZLJB5IVKBAGLG7G/graph.json","events_json":"https://pith.science/api/pith-number/TN3OVNYI4XXZLJB5IVKBAGLG7G/events.json","paper":"https://pith.science/paper/TN3OVNYI"},"agent_actions":{"view_html":"https://pith.science/pith/TN3OVNYI4XXZLJB5IVKBAGLG7G","download_json":"https://pith.science/pith/TN3OVNYI4XXZLJB5IVKBAGLG7G.json","view_paper":"https://pith.science/paper/TN3OVNYI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2112.09620&json=true","fetch_graph":"https://pith.science/api/pith-number/TN3OVNYI4XXZLJB5IVKBAGLG7G/graph.json","fetch_events":"https://pith.science/api/pith-number/TN3OVNYI4XXZLJB5IVKBAGLG7G/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/TN3OVNYI4XXZLJB5IVKBAGLG7G/action/timestamp_anchor","attest_storage":"https://pith.science/pith/TN3OVNYI4XXZLJB5IVKBAGLG7G/action/storage_attestation","attest_author":"https://pith.science/pith/TN3OVNYI4XXZLJB5IVKBAGLG7G/action/author_attestation","sign_citation":"https://pith.science/pith/TN3OVNYI4XXZLJB5IVKBAGLG7G/action/citation_signature","submit_replication":"https://pith.science/pith/TN3OVNYI4XXZLJB5IVKBAGLG7G/action/replication_record"}},"created_at":"2026-07-05T04:25:50.953762+00:00","updated_at":"2026-07-05T04:25:50.953762+00:00"}