{"paper":{"title":"Gravitational Waves from the Big Bang","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"Gravitational waves from cosmic inflation could explain the NANOGrav signal","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Lucas Martins Barreto Alves","submitted_at":"2025-11-20T20:23:52Z","abstract_excerpt":"For millennia, humanity has relied exclusively on light$\\unicode{x2014}$initially visible light and, later, broader and broader portions of the electromagnetic spectrum$\\unicode{x2014}$to observe the universe. In the past decade, a remarkable chapter in extending astronomy beyond electromagnetic antennas has been concretized: the dawn of gravitational-wave astronomy has opened a new observational window into the cosmos. Among the many new astronomical sources we may now look for and study through their gravitational-wave signals, the Big Bang is surely among the most fascinating. Gravitational"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"Gravitational waves from cosmic inflation could have originated the gravitational-wave signal sought by the NANOGrav observatory.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That the stochastic gravitational wave background targeted by NANOGrav is produced by primordial inflation rather than by astrophysical sources such as supermassive black hole binaries.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Dissertation investigates gravitational waves produced during cosmic inflation as a possible origin for the nanohertz stochastic background sought by NANOGrav.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Gravitational waves from cosmic inflation could explain the NANOGrav signal","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"46454120f995df3f5f70a5d1c25c60837aa53383b957cf70ce83679eb30947ed"},"source":{"id":"2511.17659","kind":"arxiv","version":3},"verdict":{"id":"598a3e3a-621c-4651-aaa8-966960f04cd0","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-17T20:07:50.356116Z","strongest_claim":"Gravitational waves from cosmic inflation could have originated the gravitational-wave signal sought by the NANOGrav observatory.","one_line_summary":"Dissertation investigates gravitational waves produced during cosmic inflation as a possible origin for the nanohertz stochastic background sought by NANOGrav.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That the stochastic gravitational wave background targeted by NANOGrav is produced by primordial inflation rather than by astrophysical sources such as supermassive black hole binaries.","pith_extraction_headline":"Gravitational waves from cosmic inflation could explain the NANOGrav signal"},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2511.17659/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":2,"snapshot_sha256":"c808ad6a149b1d3d9c4af84af82d87648defebef038f85b0cc05f36d979e07ac"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}