{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:RTAVMQYMESL4ARC7MFOUH4IJVV","short_pith_number":"pith:RTAVMQYM","schema_version":"1.0","canonical_sha256":"8cc156430c2497c0445f615d43f109ad60272d842c9dfc9a062a7ab9cb1fa3af","source":{"kind":"arxiv","id":"2102.02712","version":2},"attestation_state":"computed","paper":{"title":"Tachyonic Preheating in Palatini $R^2$ Inflation","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Alexandros Karam, Eemeli Tomberg, Hardi Veerm\\\"ae","submitted_at":"2021-02-04T16:11:57Z","abstract_excerpt":"We study preheating in the Palatini formalism with a quadratic inflaton potential and an added $\\alpha R^2$ term. In such models, the oscillating inflaton field repeatedly returns to the plateau of the Einstein frame potential, on which the tachyonic instability fragments the inflaton condensate within less than an e-fold. We find that tachyonic preheating takes place when $\\alpha \\gtrsim 10^{13}$ and that the energy density of the fragmented field grows with the rate $\\Gamma/H \\approx 0.011 \\times \\alpha^{0.31}$. The model extends the family of plateau models with similar preheating behaviour"},"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":"2102.02712","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-02-04T16:11:57Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"86b7c24aa48d90ca0c560980f601d9c6db5e15a95d7abdba1e03771304e56ac0","abstract_canon_sha256":"bf087aa4bdb593f4b83fa450a3800a90e3cc9c1470dee2ff6377002b696efb9f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:17:47.902177Z","signature_b64":"sSUzJcyOZVLpOns5adsRuhwRRlrftRh4LihtHHGRDBYxaHZw3/vk5cl9ttuASEY4y7ddjdXQTo1O/mMTU+exAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8cc156430c2497c0445f615d43f109ad60272d842c9dfc9a062a7ab9cb1fa3af","last_reissued_at":"2026-07-05T03:17:47.901574Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:17:47.901574Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Tachyonic Preheating in Palatini $R^2$ Inflation","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Alexandros Karam, Eemeli Tomberg, Hardi Veerm\\\"ae","submitted_at":"2021-02-04T16:11:57Z","abstract_excerpt":"We study preheating in the Palatini formalism with a quadratic inflaton potential and an added $\\alpha R^2$ term. In such models, the oscillating inflaton field repeatedly returns to the plateau of the Einstein frame potential, on which the tachyonic instability fragments the inflaton condensate within less than an e-fold. We find that tachyonic preheating takes place when $\\alpha \\gtrsim 10^{13}$ and that the energy density of the fragmented field grows with the rate $\\Gamma/H \\approx 0.011 \\times \\alpha^{0.31}$. The model extends the family of plateau models with similar preheating behaviour"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.02712","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/2102.02712/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":"2102.02712","created_at":"2026-07-05T03:17:47.901655+00:00"},{"alias_kind":"arxiv_version","alias_value":"2102.02712v2","created_at":"2026-07-05T03:17:47.901655+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.02712","created_at":"2026-07-05T03:17:47.901655+00:00"},{"alias_kind":"pith_short_12","alias_value":"RTAVMQYMESL4","created_at":"2026-07-05T03:17:47.901655+00:00"},{"alias_kind":"pith_short_16","alias_value":"RTAVMQYMESL4ARC7","created_at":"2026-07-05T03:17:47.901655+00:00"},{"alias_kind":"pith_short_8","alias_value":"RTAVMQYM","created_at":"2026-07-05T03:17:47.901655+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2501.13811","citing_title":"Inflaton Self Resonance, Oscillons, and Gravitational Waves in Small Field Polynomial Inflation","ref_index":33,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/RTAVMQYMESL4ARC7MFOUH4IJVV","json":"https://pith.science/pith/RTAVMQYMESL4ARC7MFOUH4IJVV.json","graph_json":"https://pith.science/api/pith-number/RTAVMQYMESL4ARC7MFOUH4IJVV/graph.json","events_json":"https://pith.science/api/pith-number/RTAVMQYMESL4ARC7MFOUH4IJVV/events.json","paper":"https://pith.science/paper/RTAVMQYM"},"agent_actions":{"view_html":"https://pith.science/pith/RTAVMQYMESL4ARC7MFOUH4IJVV","download_json":"https://pith.science/pith/RTAVMQYMESL4ARC7MFOUH4IJVV.json","view_paper":"https://pith.science/paper/RTAVMQYM","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2102.02712&json=true","fetch_graph":"https://pith.science/api/pith-number/RTAVMQYMESL4ARC7MFOUH4IJVV/graph.json","fetch_events":"https://pith.science/api/pith-number/RTAVMQYMESL4ARC7MFOUH4IJVV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/RTAVMQYMESL4ARC7MFOUH4IJVV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/RTAVMQYMESL4ARC7MFOUH4IJVV/action/storage_attestation","attest_author":"https://pith.science/pith/RTAVMQYMESL4ARC7MFOUH4IJVV/action/author_attestation","sign_citation":"https://pith.science/pith/RTAVMQYMESL4ARC7MFOUH4IJVV/action/citation_signature","submit_replication":"https://pith.science/pith/RTAVMQYMESL4ARC7MFOUH4IJVV/action/replication_record"}},"created_at":"2026-07-05T03:17:47.901655+00:00","updated_at":"2026-07-05T03:17:47.901655+00:00"}