{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:PII3SSUCHNPPOQIARCIH5PP7FM","short_pith_number":"pith:PII3SSUC","canonical_record":{"source":{"id":"1702.07132","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.hist-ph","submitted_at":"2017-02-23T08:23:22Z","cross_cats_sorted":["astro-ph.CO","gr-qc","hep-ph","hep-th"],"title_canon_sha256":"72945662f6680e187e453233ac8be5d051790d2731a3f553b374819d1f2db075","abstract_canon_sha256":"55b3c70881f62fd43e31893156b45e46d83f20273d1b541aa7198e279e3b953c"},"schema_version":"1.0"},"canonical_sha256":"7a11b94a823b5ef7410088907ebdff2b17340bea4557ab47bf37cd0ec63358dc","source":{"kind":"arxiv","id":"1702.07132","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.07132","created_at":"2026-05-18T00:50:08Z"},{"alias_kind":"arxiv_version","alias_value":"1702.07132v1","created_at":"2026-05-18T00:50:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.07132","created_at":"2026-05-18T00:50:08Z"},{"alias_kind":"pith_short_12","alias_value":"PII3SSUCHNPP","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_16","alias_value":"PII3SSUCHNPPOQIA","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_8","alias_value":"PII3SSUC","created_at":"2026-05-18T12:31:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:PII3SSUCHNPPOQIARCIH5PP7FM","target":"record","payload":{"canonical_record":{"source":{"id":"1702.07132","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.hist-ph","submitted_at":"2017-02-23T08:23:22Z","cross_cats_sorted":["astro-ph.CO","gr-qc","hep-ph","hep-th"],"title_canon_sha256":"72945662f6680e187e453233ac8be5d051790d2731a3f553b374819d1f2db075","abstract_canon_sha256":"55b3c70881f62fd43e31893156b45e46d83f20273d1b541aa7198e279e3b953c"},"schema_version":"1.0"},"canonical_sha256":"7a11b94a823b5ef7410088907ebdff2b17340bea4557ab47bf37cd0ec63358dc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:50:08.166600Z","signature_b64":"3xyNsG/C2s8L6XMth8e7dIQ8ziRsNdoAKsfeOIrgJ9NwRfySdj28VdjR2WUOyVeA2B+FaMzRyQgZy+6/Nkg1AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7a11b94a823b5ef7410088907ebdff2b17340bea4557ab47bf37cd0ec63358dc","last_reissued_at":"2026-05-18T00:50:08.165870Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:50:08.165870Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1702.07132","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":"2026-05-18T00:50:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AlKtZyPO9Z4/XBD+WcgRSm74zhrGLvPJaXoupTZdtMENZCDxaZvP9THnMEDSZFOjx21aDE+6mPbsBNmup+fODA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T01:34:30.587377Z"},"content_sha256":"9f82a55cbb52ed5da75275625b2d1397a4bc90b87d64046541ee53e7bb708edf","schema_version":"1.0","event_id":"sha256:9f82a55cbb52ed5da75275625b2d1397a4bc90b87d64046541ee53e7bb708edf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:PII3SSUCHNPPOQIARCIH5PP7FM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fifty years of cosmological particle creation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","gr-qc","hep-ph","hep-th"],"primary_cat":"physics.hist-ph","authors_text":"Jose Navarro-Salas, Leonard Parker","submitted_at":"2017-02-23T08:23:22Z","abstract_excerpt":"In the early sixties Leonard Parker discovered that the expansion of the universe can create particles out of the vacuum, opening a new and fruitfull field in physics. We give a historical review in the form of an interview that took place during the Conference ERE2014 (Valencia 1-5, September, 2014)."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.07132","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":"2026-05-18T00:50:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O9A58sbcNR63N6Y8Lpyb0WHnyxP40g9kQaKN2gp/uklHS62Zr/i1UM8uATge+SgG3t+iqSzyuHdokqZ1GBJTAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T01:34:30.588058Z"},"content_sha256":"6dea5919a18f7465ed9292529051e96324048666eb6a8055ecf67180b9226686","schema_version":"1.0","event_id":"sha256:6dea5919a18f7465ed9292529051e96324048666eb6a8055ecf67180b9226686"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PII3SSUCHNPPOQIARCIH5PP7FM/bundle.json","state_url":"https://pith.science/pith/PII3SSUCHNPPOQIARCIH5PP7FM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PII3SSUCHNPPOQIARCIH5PP7FM/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":"2026-06-08T01:34:30Z","links":{"resolver":"https://pith.science/pith/PII3SSUCHNPPOQIARCIH5PP7FM","bundle":"https://pith.science/pith/PII3SSUCHNPPOQIARCIH5PP7FM/bundle.json","state":"https://pith.science/pith/PII3SSUCHNPPOQIARCIH5PP7FM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PII3SSUCHNPPOQIARCIH5PP7FM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:PII3SSUCHNPPOQIARCIH5PP7FM","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":"55b3c70881f62fd43e31893156b45e46d83f20273d1b541aa7198e279e3b953c","cross_cats_sorted":["astro-ph.CO","gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.hist-ph","submitted_at":"2017-02-23T08:23:22Z","title_canon_sha256":"72945662f6680e187e453233ac8be5d051790d2731a3f553b374819d1f2db075"},"schema_version":"1.0","source":{"id":"1702.07132","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.07132","created_at":"2026-05-18T00:50:08Z"},{"alias_kind":"arxiv_version","alias_value":"1702.07132v1","created_at":"2026-05-18T00:50:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.07132","created_at":"2026-05-18T00:50:08Z"},{"alias_kind":"pith_short_12","alias_value":"PII3SSUCHNPP","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_16","alias_value":"PII3SSUCHNPPOQIA","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_8","alias_value":"PII3SSUC","created_at":"2026-05-18T12:31:37Z"}],"graph_snapshots":[{"event_id":"sha256:6dea5919a18f7465ed9292529051e96324048666eb6a8055ecf67180b9226686","target":"graph","created_at":"2026-05-18T00:50:08Z","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":"In the early sixties Leonard Parker discovered that the expansion of the universe can create particles out of the vacuum, opening a new and fruitfull field in physics. We give a historical review in the form of an interview that took place during the Conference ERE2014 (Valencia 1-5, September, 2014).","authors_text":"Jose Navarro-Salas, Leonard Parker","cross_cats":["astro-ph.CO","gr-qc","hep-ph","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.hist-ph","submitted_at":"2017-02-23T08:23:22Z","title":"Fifty years of cosmological particle creation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.07132","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":"sha256:9f82a55cbb52ed5da75275625b2d1397a4bc90b87d64046541ee53e7bb708edf","target":"record","created_at":"2026-05-18T00:50:08Z","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":"55b3c70881f62fd43e31893156b45e46d83f20273d1b541aa7198e279e3b953c","cross_cats_sorted":["astro-ph.CO","gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.hist-ph","submitted_at":"2017-02-23T08:23:22Z","title_canon_sha256":"72945662f6680e187e453233ac8be5d051790d2731a3f553b374819d1f2db075"},"schema_version":"1.0","source":{"id":"1702.07132","kind":"arxiv","version":1}},"canonical_sha256":"7a11b94a823b5ef7410088907ebdff2b17340bea4557ab47bf37cd0ec63358dc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7a11b94a823b5ef7410088907ebdff2b17340bea4557ab47bf37cd0ec63358dc","first_computed_at":"2026-05-18T00:50:08.165870Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:50:08.165870Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3xyNsG/C2s8L6XMth8e7dIQ8ziRsNdoAKsfeOIrgJ9NwRfySdj28VdjR2WUOyVeA2B+FaMzRyQgZy+6/Nkg1AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:50:08.166600Z","signed_message":"canonical_sha256_bytes"},"source_id":"1702.07132","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9f82a55cbb52ed5da75275625b2d1397a4bc90b87d64046541ee53e7bb708edf","sha256:6dea5919a18f7465ed9292529051e96324048666eb6a8055ecf67180b9226686"],"state_sha256":"e9af4f05624535e6192be0a8865359ce0d9dfcba6a302adfb066117aaac32ffd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2fsAxnw5xH6fOK9BWCzSkuIv4oew3HjqglI9LlshN0hhcn+v+l77eoFsTyluUy9dJRFCa4drWbtytOrtQR4KDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T01:34:30.593724Z","bundle_sha256":"24e1980fa32ccb44e9731cbe36877ce695d616f6e98a864852ad68d81fe7acf3"}}