{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:SYHS2YIC2LRAXI3PCBMCUU5VSC","short_pith_number":"pith:SYHS2YIC","schema_version":"1.0","canonical_sha256":"960f2d6102d2e20ba36f10582a53b59086c1f83ab6d754039c5a2c32fca795f3","source":{"kind":"arxiv","id":"1505.04686","version":4},"attestation_state":"computed","paper":{"title":"Vector field instability and the primordial tensor spectrum","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":"Benjamin A. Stephens, Dustin Lorshbough, Stefan Eccles, Willy Fischler","submitted_at":"2015-05-18T15:41:10Z","abstract_excerpt":"It has recently been shown that the presence of a spectator pseudoscalar field, coupled to photons through a Chern-Simons term, can amplify the primordial tensor spectrum without observationally disrupting the primordial scalar spectrum. The amplification occurs due to an instability that develops for the vector fields. We consider the extension of previous studies to account for the contribution arising from an inhomogeneous vector background which is generated prior to the onset of inflation. We find that there may be contributions in which net momentum is transferred between the inhomogeneo"},"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":"1505.04686","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-05-18T15:41:10Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"1f41c907297a29487d50b2e6694d93c3d48a954a0d540d96c5b446e6c300d4cf","abstract_canon_sha256":"eebca08fd1403f5693640dc0f6c41ee586f216448c47c50584eeb3b48b53202c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:15:30.553471Z","signature_b64":"WcfR9Lo30a2/uv2dNH9v4xY61sp5porjEnkLBtacNNSJGlUB6PhSkNWDdcKRwMIhHgm2pPNZlfeKe97kkwCVDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"960f2d6102d2e20ba36f10582a53b59086c1f83ab6d754039c5a2c32fca795f3","last_reissued_at":"2026-05-18T01:15:30.552828Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:15:30.552828Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Vector field instability and the primordial tensor spectrum","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":"Benjamin A. Stephens, Dustin Lorshbough, Stefan Eccles, Willy Fischler","submitted_at":"2015-05-18T15:41:10Z","abstract_excerpt":"It has recently been shown that the presence of a spectator pseudoscalar field, coupled to photons through a Chern-Simons term, can amplify the primordial tensor spectrum without observationally disrupting the primordial scalar spectrum. The amplification occurs due to an instability that develops for the vector fields. We consider the extension of previous studies to account for the contribution arising from an inhomogeneous vector background which is generated prior to the onset of inflation. We find that there may be contributions in which net momentum is transferred between the inhomogeneo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.04686","kind":"arxiv","version":4},"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":"1505.04686","created_at":"2026-05-18T01:15:30.552911+00:00"},{"alias_kind":"arxiv_version","alias_value":"1505.04686v4","created_at":"2026-05-18T01:15:30.552911+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.04686","created_at":"2026-05-18T01:15:30.552911+00:00"},{"alias_kind":"pith_short_12","alias_value":"SYHS2YIC2LRA","created_at":"2026-05-18T12:29:42.218222+00:00"},{"alias_kind":"pith_short_16","alias_value":"SYHS2YIC2LRAXI3P","created_at":"2026-05-18T12:29:42.218222+00:00"},{"alias_kind":"pith_short_8","alias_value":"SYHS2YIC","created_at":"2026-05-18T12:29:42.218222+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/SYHS2YIC2LRAXI3PCBMCUU5VSC","json":"https://pith.science/pith/SYHS2YIC2LRAXI3PCBMCUU5VSC.json","graph_json":"https://pith.science/api/pith-number/SYHS2YIC2LRAXI3PCBMCUU5VSC/graph.json","events_json":"https://pith.science/api/pith-number/SYHS2YIC2LRAXI3PCBMCUU5VSC/events.json","paper":"https://pith.science/paper/SYHS2YIC"},"agent_actions":{"view_html":"https://pith.science/pith/SYHS2YIC2LRAXI3PCBMCUU5VSC","download_json":"https://pith.science/pith/SYHS2YIC2LRAXI3PCBMCUU5VSC.json","view_paper":"https://pith.science/paper/SYHS2YIC","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1505.04686&json=true","fetch_graph":"https://pith.science/api/pith-number/SYHS2YIC2LRAXI3PCBMCUU5VSC/graph.json","fetch_events":"https://pith.science/api/pith-number/SYHS2YIC2LRAXI3PCBMCUU5VSC/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/SYHS2YIC2LRAXI3PCBMCUU5VSC/action/timestamp_anchor","attest_storage":"https://pith.science/pith/SYHS2YIC2LRAXI3PCBMCUU5VSC/action/storage_attestation","attest_author":"https://pith.science/pith/SYHS2YIC2LRAXI3PCBMCUU5VSC/action/author_attestation","sign_citation":"https://pith.science/pith/SYHS2YIC2LRAXI3PCBMCUU5VSC/action/citation_signature","submit_replication":"https://pith.science/pith/SYHS2YIC2LRAXI3PCBMCUU5VSC/action/replication_record"}},"created_at":"2026-05-18T01:15:30.552911+00:00","updated_at":"2026-05-18T01:15:30.552911+00:00"}