{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:MKO5OQDDH2IXUO24HSRTYJ2SDA","short_pith_number":"pith:MKO5OQDD","schema_version":"1.0","canonical_sha256":"629dd740633e917a3b5c3ca33c2752181dedebf53637cb17a98f98ae15b7e8cb","source":{"kind":"arxiv","id":"1907.00258","version":1},"attestation_state":"computed","paper":{"title":"On the Quantum-to-Classical Transition of Primordial Perturbations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"gr-qc","authors_text":"Wouter Ryssens","submitted_at":"2019-06-29T18:58:47Z","abstract_excerpt":"Detailed measurements of the cosmic microwave background indicate the large-scale homogeneity of the universe. On very small scales, we observe however inhomogeneities such as galaxies, stars, planets and ourselves. In the context of hot Big-Bang cosmology, these inhomogeneities are often explained as the remains of quantum fluctuations at very early times, enlarged to observable scales through the process of inflation. In this dissertation, I examine two important questions surrounding this scenario: a) How do inherently quantal fluctuations transition to the observed inhomogeneities, which b"},"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":"1907.00258","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-06-29T18:58:47Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"70822d10f0ed5e0c125d0d9ce546fe4002948749caf956ed8154ce0edb145bd5","abstract_canon_sha256":"4789a8a4757940c5d2cf0910d78fb8c0e68d7cfca0cd36bd6a82c7526e23dfe3"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:41:52.340950Z","signature_b64":"gsHZRg5Ax7l3R5SaX20zteUrH2ZzsFRXgtfylqVdlipGIpyeXjqDXMS+n0MchL2Vkiu7cYHK96OVwMeglMgVBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"629dd740633e917a3b5c3ca33c2752181dedebf53637cb17a98f98ae15b7e8cb","last_reissued_at":"2026-05-17T23:41:52.340274Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:41:52.340274Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"On the Quantum-to-Classical Transition of Primordial Perturbations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"gr-qc","authors_text":"Wouter Ryssens","submitted_at":"2019-06-29T18:58:47Z","abstract_excerpt":"Detailed measurements of the cosmic microwave background indicate the large-scale homogeneity of the universe. On very small scales, we observe however inhomogeneities such as galaxies, stars, planets and ourselves. In the context of hot Big-Bang cosmology, these inhomogeneities are often explained as the remains of quantum fluctuations at very early times, enlarged to observable scales through the process of inflation. In this dissertation, I examine two important questions surrounding this scenario: a) How do inherently quantal fluctuations transition to the observed inhomogeneities, which b"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.00258","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1907.00258","created_at":"2026-05-17T23:41:52.340379+00:00"},{"alias_kind":"arxiv_version","alias_value":"1907.00258v1","created_at":"2026-05-17T23:41:52.340379+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.00258","created_at":"2026-05-17T23:41:52.340379+00:00"},{"alias_kind":"pith_short_12","alias_value":"MKO5OQDDH2IX","created_at":"2026-05-18T12:33:21.387695+00:00"},{"alias_kind":"pith_short_16","alias_value":"MKO5OQDDH2IXUO24","created_at":"2026-05-18T12:33:21.387695+00:00"},{"alias_kind":"pith_short_8","alias_value":"MKO5OQDD","created_at":"2026-05-18T12:33:21.387695+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/MKO5OQDDH2IXUO24HSRTYJ2SDA","json":"https://pith.science/pith/MKO5OQDDH2IXUO24HSRTYJ2SDA.json","graph_json":"https://pith.science/api/pith-number/MKO5OQDDH2IXUO24HSRTYJ2SDA/graph.json","events_json":"https://pith.science/api/pith-number/MKO5OQDDH2IXUO24HSRTYJ2SDA/events.json","paper":"https://pith.science/paper/MKO5OQDD"},"agent_actions":{"view_html":"https://pith.science/pith/MKO5OQDDH2IXUO24HSRTYJ2SDA","download_json":"https://pith.science/pith/MKO5OQDDH2IXUO24HSRTYJ2SDA.json","view_paper":"https://pith.science/paper/MKO5OQDD","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1907.00258&json=true","fetch_graph":"https://pith.science/api/pith-number/MKO5OQDDH2IXUO24HSRTYJ2SDA/graph.json","fetch_events":"https://pith.science/api/pith-number/MKO5OQDDH2IXUO24HSRTYJ2SDA/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/MKO5OQDDH2IXUO24HSRTYJ2SDA/action/timestamp_anchor","attest_storage":"https://pith.science/pith/MKO5OQDDH2IXUO24HSRTYJ2SDA/action/storage_attestation","attest_author":"https://pith.science/pith/MKO5OQDDH2IXUO24HSRTYJ2SDA/action/author_attestation","sign_citation":"https://pith.science/pith/MKO5OQDDH2IXUO24HSRTYJ2SDA/action/citation_signature","submit_replication":"https://pith.science/pith/MKO5OQDDH2IXUO24HSRTYJ2SDA/action/replication_record"}},"created_at":"2026-05-17T23:41:52.340379+00:00","updated_at":"2026-05-17T23:41:52.340379+00:00"}