{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:OJZTLFN7EUEYXEYHLZSM4M4PCT","short_pith_number":"pith:OJZTLFN7","canonical_record":{"source":{"id":"1510.07580","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-10-26T18:23:06Z","cross_cats_sorted":[],"title_canon_sha256":"c5a5982f67cbe25ad909dc7807a0fbc835b0701c6f09a152a132aa62371ac4ce","abstract_canon_sha256":"4d4cafd0f62c304ed18c1aaca5a78a0995a3b4b24cfb422970565e42814e1bad"},"schema_version":"1.0"},"canonical_sha256":"72733595bf25098b93075e64ce338f14d8b5ac3830bf21e242f6ca611132acd3","source":{"kind":"arxiv","id":"1510.07580","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.07580","created_at":"2026-05-18T00:05:40Z"},{"alias_kind":"arxiv_version","alias_value":"1510.07580v1","created_at":"2026-05-18T00:05:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.07580","created_at":"2026-05-18T00:05:40Z"},{"alias_kind":"pith_short_12","alias_value":"OJZTLFN7EUEY","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"OJZTLFN7EUEYXEYH","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"OJZTLFN7","created_at":"2026-05-18T12:29:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:OJZTLFN7EUEYXEYHLZSM4M4PCT","target":"record","payload":{"canonical_record":{"source":{"id":"1510.07580","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-10-26T18:23:06Z","cross_cats_sorted":[],"title_canon_sha256":"c5a5982f67cbe25ad909dc7807a0fbc835b0701c6f09a152a132aa62371ac4ce","abstract_canon_sha256":"4d4cafd0f62c304ed18c1aaca5a78a0995a3b4b24cfb422970565e42814e1bad"},"schema_version":"1.0"},"canonical_sha256":"72733595bf25098b93075e64ce338f14d8b5ac3830bf21e242f6ca611132acd3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:05:40.053237Z","signature_b64":"pPe/i0A/uVT15kd++Y1AFJCtEmD4hAqKjYTxPXb2M/i1tQmz8WytCKOTe35Qg1ch8UgbXa3WjUlw/keCK9E0Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"72733595bf25098b93075e64ce338f14d8b5ac3830bf21e242f6ca611132acd3","last_reissued_at":"2026-05-18T00:05:40.052820Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:05:40.052820Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.07580","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:05:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v6HvL15cYIWQTXaq0pmHZ1iBkps+wlNwVZJYtaPzQ/BeYwcXrPIcgauSAKTrGiSbFLZSetbbvJ1wp6edUwjnCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T21:17:38.869536Z"},"content_sha256":"d4569880708b48130801938916baf9b00f85d8c422714da4ce4c9f72653698b8","schema_version":"1.0","event_id":"sha256:d4569880708b48130801938916baf9b00f85d8c422714da4ce4c9f72653698b8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:OJZTLFN7EUEYXEYHLZSM4M4PCT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nonlinear Excitations in Inflationary Power Spectra","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Chen He, Hayato Motohashi, V Miranda, Wayne Hu","submitted_at":"2015-10-26T18:23:06Z","abstract_excerpt":"We develop methods to calculate the curvature power spectrum in models where features in the inflaton potential nonlinearly excite modes and generate high frequency features in the spectrum. The first nontrivial effect of excitations generating further excitations arises at third order in deviations from slow roll. If these further excitations are contemporaneous, the series can be resummed, showing the exponential sensitivity of the curvature spectrum to potential features. More generally, this exponential approximation provides a power spectrum template which nonlinearly obeys relations betw"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.07580","kind":"arxiv","version":1},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:05:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HbMiOomlThxSIGJgMe9fU0AsBRa6hcHU7/zkKF9KKekVuycpXpqqT7Xs1Y+CTT57O7zOpO5OU6/+Q/UvADw3Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T21:17:38.870020Z"},"content_sha256":"13792aa10d875635e6d6f5eb1fba6e4ac49c268b72f5bba77f547a2f3d309589","schema_version":"1.0","event_id":"sha256:13792aa10d875635e6d6f5eb1fba6e4ac49c268b72f5bba77f547a2f3d309589"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OJZTLFN7EUEYXEYHLZSM4M4PCT/bundle.json","state_url":"https://pith.science/pith/OJZTLFN7EUEYXEYHLZSM4M4PCT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OJZTLFN7EUEYXEYHLZSM4M4PCT/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-25T21:17:38Z","links":{"resolver":"https://pith.science/pith/OJZTLFN7EUEYXEYHLZSM4M4PCT","bundle":"https://pith.science/pith/OJZTLFN7EUEYXEYHLZSM4M4PCT/bundle.json","state":"https://pith.science/pith/OJZTLFN7EUEYXEYHLZSM4M4PCT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OJZTLFN7EUEYXEYHLZSM4M4PCT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:OJZTLFN7EUEYXEYHLZSM4M4PCT","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"4d4cafd0f62c304ed18c1aaca5a78a0995a3b4b24cfb422970565e42814e1bad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-10-26T18:23:06Z","title_canon_sha256":"c5a5982f67cbe25ad909dc7807a0fbc835b0701c6f09a152a132aa62371ac4ce"},"schema_version":"1.0","source":{"id":"1510.07580","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.07580","created_at":"2026-05-18T00:05:40Z"},{"alias_kind":"arxiv_version","alias_value":"1510.07580v1","created_at":"2026-05-18T00:05:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.07580","created_at":"2026-05-18T00:05:40Z"},{"alias_kind":"pith_short_12","alias_value":"OJZTLFN7EUEY","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"OJZTLFN7EUEYXEYH","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"OJZTLFN7","created_at":"2026-05-18T12:29:34Z"}],"graph_snapshots":[{"event_id":"sha256:13792aa10d875635e6d6f5eb1fba6e4ac49c268b72f5bba77f547a2f3d309589","target":"graph","created_at":"2026-05-18T00:05:40Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We develop methods to calculate the curvature power spectrum in models where features in the inflaton potential nonlinearly excite modes and generate high frequency features in the spectrum. The first nontrivial effect of excitations generating further excitations arises at third order in deviations from slow roll. If these further excitations are contemporaneous, the series can be resummed, showing the exponential sensitivity of the curvature spectrum to potential features. More generally, this exponential approximation provides a power spectrum template which nonlinearly obeys relations betw","authors_text":"Chen He, Hayato Motohashi, V Miranda, Wayne Hu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-10-26T18:23:06Z","title":"Nonlinear Excitations in Inflationary Power Spectra"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.07580","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:d4569880708b48130801938916baf9b00f85d8c422714da4ce4c9f72653698b8","target":"record","created_at":"2026-05-18T00:05:40Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"4d4cafd0f62c304ed18c1aaca5a78a0995a3b4b24cfb422970565e42814e1bad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-10-26T18:23:06Z","title_canon_sha256":"c5a5982f67cbe25ad909dc7807a0fbc835b0701c6f09a152a132aa62371ac4ce"},"schema_version":"1.0","source":{"id":"1510.07580","kind":"arxiv","version":1}},"canonical_sha256":"72733595bf25098b93075e64ce338f14d8b5ac3830bf21e242f6ca611132acd3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"72733595bf25098b93075e64ce338f14d8b5ac3830bf21e242f6ca611132acd3","first_computed_at":"2026-05-18T00:05:40.052820Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:05:40.052820Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pPe/i0A/uVT15kd++Y1AFJCtEmD4hAqKjYTxPXb2M/i1tQmz8WytCKOTe35Qg1ch8UgbXa3WjUlw/keCK9E0Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:05:40.053237Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.07580","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d4569880708b48130801938916baf9b00f85d8c422714da4ce4c9f72653698b8","sha256:13792aa10d875635e6d6f5eb1fba6e4ac49c268b72f5bba77f547a2f3d309589"],"state_sha256":"0d0550d881e224244f847df762056c1e2af75c35ea8714f7f53b51458989aa76"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cm3FATZ09INTsrSVePzohCQCTLHMuTSqQR1AQcNUUfM67awt4J/dVxWmobOotqzhK810Q0EBSo8L3BmwKw74Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T21:17:38.873636Z","bundle_sha256":"b8d2d1ae60d38b125bcaf2b03fe2d4087145d6151cbcd7a0a86eb08c240bbaf2"}}