{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:QPM7K73BTXCR66SIKMP3M6A3TJ","short_pith_number":"pith:QPM7K73B","canonical_record":{"source":{"id":"1510.01650","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-10-05T18:32:42Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"a8e64515f9a6dcb4189f9ff853e4afbe41b0e0c4fe5479fec3227e719d207cd3","abstract_canon_sha256":"e21196f4a6f9dc58e49f998e95b9915897b67a8e025530618c36fc31ca70034e"},"schema_version":"1.0"},"canonical_sha256":"83d9f57f619dc51f7a48531fb6781b9a651fc01ed12c33768d7a7180fc41c18b","source":{"kind":"arxiv","id":"1510.01650","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.01650","created_at":"2026-05-18T01:14:25Z"},{"alias_kind":"arxiv_version","alias_value":"1510.01650v2","created_at":"2026-05-18T01:14:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.01650","created_at":"2026-05-18T01:14:25Z"},{"alias_kind":"pith_short_12","alias_value":"QPM7K73BTXCR","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QPM7K73BTXCR66SI","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QPM7K73B","created_at":"2026-05-18T12:29:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:QPM7K73BTXCR66SIKMP3M6A3TJ","target":"record","payload":{"canonical_record":{"source":{"id":"1510.01650","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-10-05T18:32:42Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"a8e64515f9a6dcb4189f9ff853e4afbe41b0e0c4fe5479fec3227e719d207cd3","abstract_canon_sha256":"e21196f4a6f9dc58e49f998e95b9915897b67a8e025530618c36fc31ca70034e"},"schema_version":"1.0"},"canonical_sha256":"83d9f57f619dc51f7a48531fb6781b9a651fc01ed12c33768d7a7180fc41c18b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:14:25.814482Z","signature_b64":"futtjKKVXyOtk2WI5pkMAcA0avMU2MU++ixzwrCg1Hao5cotWOTT9FFVW3I+EGN0noc6gn8wcUJHIHpfRYNwBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"83d9f57f619dc51f7a48531fb6781b9a651fc01ed12c33768d7a7180fc41c18b","last_reissued_at":"2026-05-18T01:14:25.813848Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:14:25.813848Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.01650","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:14:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9tye5SthXAZfzbxkaudbUMXlGQ0cO18tZTH2CbKsYRGjqgAXQfFeFO9R2ZksFffDPVEoJUhtPOyADhV8xl/6DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T17:31:13.858394Z"},"content_sha256":"5eb5c3548f8db19ad798f7929065410bd1c12fe19359f9cb61435c7a6505ad65","schema_version":"1.0","event_id":"sha256:5eb5c3548f8db19ad798f7929065410bd1c12fe19359f9cb61435c7a6505ad65"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:QPM7K73BTXCR66SIKMP3M6A3TJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Disformally coupled inflation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"Carsten van de Bruck, Chris Longden, Tomi Koivisto","submitted_at":"2015-10-05T18:32:42Z","abstract_excerpt":"A disformal coupling between two scalar fields is considered in the context of cosmological inflation. The coupling introduces novel derivative interactions mixing the kinetic terms of the fields but without introducing superluminal or unstable propagation of the two scalar fluctuation modes. Though the typical effect of the disformal coupling is to inhibit one of the fields from inflating the universe, the energy density of the other field can drive viable near Sitter -inflation in the presence of nontrivial disformal dynamics, in particular when one assumes exponential instead of power-law f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.01650","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":""},"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":"2026-05-18T01:14:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WmPP+VNg+BrlIEaEw0Jt2BOKi/zYiJwtcdH0DS7xy0wPnQcfwDoLQVdsEy3jnYHLK+RXxDXtGOKhY7P6sCELAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T17:31:13.859051Z"},"content_sha256":"e809aea51a2acffb17eb74a6371ddbb4698b820d8d356e880bf6310c87fdd633","schema_version":"1.0","event_id":"sha256:e809aea51a2acffb17eb74a6371ddbb4698b820d8d356e880bf6310c87fdd633"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QPM7K73BTXCR66SIKMP3M6A3TJ/bundle.json","state_url":"https://pith.science/pith/QPM7K73BTXCR66SIKMP3M6A3TJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QPM7K73BTXCR66SIKMP3M6A3TJ/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":"2026-05-31T17:31:13Z","links":{"resolver":"https://pith.science/pith/QPM7K73BTXCR66SIKMP3M6A3TJ","bundle":"https://pith.science/pith/QPM7K73BTXCR66SIKMP3M6A3TJ/bundle.json","state":"https://pith.science/pith/QPM7K73BTXCR66SIKMP3M6A3TJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QPM7K73BTXCR66SIKMP3M6A3TJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:QPM7K73BTXCR66SIKMP3M6A3TJ","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":"e21196f4a6f9dc58e49f998e95b9915897b67a8e025530618c36fc31ca70034e","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-10-05T18:32:42Z","title_canon_sha256":"a8e64515f9a6dcb4189f9ff853e4afbe41b0e0c4fe5479fec3227e719d207cd3"},"schema_version":"1.0","source":{"id":"1510.01650","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.01650","created_at":"2026-05-18T01:14:25Z"},{"alias_kind":"arxiv_version","alias_value":"1510.01650v2","created_at":"2026-05-18T01:14:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.01650","created_at":"2026-05-18T01:14:25Z"},{"alias_kind":"pith_short_12","alias_value":"QPM7K73BTXCR","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QPM7K73BTXCR66SI","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QPM7K73B","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:e809aea51a2acffb17eb74a6371ddbb4698b820d8d356e880bf6310c87fdd633","target":"graph","created_at":"2026-05-18T01:14:25Z","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":"A disformal coupling between two scalar fields is considered in the context of cosmological inflation. The coupling introduces novel derivative interactions mixing the kinetic terms of the fields but without introducing superluminal or unstable propagation of the two scalar fluctuation modes. Though the typical effect of the disformal coupling is to inhibit one of the fields from inflating the universe, the energy density of the other field can drive viable near Sitter -inflation in the presence of nontrivial disformal dynamics, in particular when one assumes exponential instead of power-law f","authors_text":"Carsten van de Bruck, Chris Longden, Tomi Koivisto","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-10-05T18:32:42Z","title":"Disformally coupled inflation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.01650","kind":"arxiv","version":2},"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":"sha256:5eb5c3548f8db19ad798f7929065410bd1c12fe19359f9cb61435c7a6505ad65","target":"record","created_at":"2026-05-18T01:14:25Z","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":"e21196f4a6f9dc58e49f998e95b9915897b67a8e025530618c36fc31ca70034e","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-10-05T18:32:42Z","title_canon_sha256":"a8e64515f9a6dcb4189f9ff853e4afbe41b0e0c4fe5479fec3227e719d207cd3"},"schema_version":"1.0","source":{"id":"1510.01650","kind":"arxiv","version":2}},"canonical_sha256":"83d9f57f619dc51f7a48531fb6781b9a651fc01ed12c33768d7a7180fc41c18b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"83d9f57f619dc51f7a48531fb6781b9a651fc01ed12c33768d7a7180fc41c18b","first_computed_at":"2026-05-18T01:14:25.813848Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:14:25.813848Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"futtjKKVXyOtk2WI5pkMAcA0avMU2MU++ixzwrCg1Hao5cotWOTT9FFVW3I+EGN0noc6gn8wcUJHIHpfRYNwBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:14:25.814482Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.01650","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5eb5c3548f8db19ad798f7929065410bd1c12fe19359f9cb61435c7a6505ad65","sha256:e809aea51a2acffb17eb74a6371ddbb4698b820d8d356e880bf6310c87fdd633"],"state_sha256":"b6a4580e31121b0cf94729f4157842f94d4cfd790790584e2db0cb51fae047fa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5hMEWZBfWXXj6L98mAXkIrWPzwiA/49qYLRx5zBGhnw6bw41Q2T86rQVVn/FpH/TeEnLn9kcnzfUfxtEVmDVDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T17:31:13.862622Z","bundle_sha256":"3e8e2051d36fc75e5b759ad5cad554f501df28830ff985820ec6b22cfea2e5b4"}}