{"paper":{"title":"Particle production during Inflation with a non-minimally coupled spectator scalar field","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"gr-qc","authors_text":"Chengjie Fu, Zhe Yu, Zong-Kuan Guo","submitted_at":"2023-07-06T16:47:37Z","abstract_excerpt":"We study the inflationary model with a spectator scalar field $\\chi$ coupled to both the inflaton and Ricci scalar. The interaction between the $\\chi$ field and the gravity, denoted by $\\xi R\\chi^2$, can trigger the tachyonic instability of certain modes of the $\\chi$ field. As a result, the $\\chi$ field perturbations are amplified and serve as a gravitational wave (GW) source. When considering the backreaction of the $\\chi$ field, an upper bound on the coupling parameter $\\xi$ must be imposed to ensure that inflation does not end prematurely. In this case, we find that the inflaton's evolutio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.03120","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/2307.03120/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"}