{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"40d1a26bb335ed08e0ace8b347f2afc1d3cbaa0ff40eefb14eb40bcd401c6ee5","created":"2026-10-03T07:17:51Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"840cacf244bd266d6c21fbc6d512a4a5662184d8c686aa686b72439ab4efc087","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"cosmo.quantum-cosmology","field":"cosmo","n":"1","review_cite":"Lehners J.-L., Review of the No-Boundary Wave Function, Physics Reports, 2023","review_link":"https://arxiv.org/abs/2303.08802","review_verified":"true","summary":"Running the expansion backward leads to a moment where ordinary physics stops working, and nobody knows whether time had a beginning or the universe bounced from an earlier phase. Quantum theory applied to the whole universe is the main tool, and its basic rules for making predictions are still disputed.","title":"The cosmic beginning and quantum cosmology","topic_ref":null,"why":"The initial state of the universe sets every later observation, and its description requires combining gravity with quantum theory."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"316c65cff3d448b6835a5fe0d3c6263860b268b7d9bf5157ff20e9877ce5ed6e","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"8e178767d12c47919e7c45ab7e2f1deaaa8cc332b9b17be756dae5fa4cf6aaa8","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"Cq0fmErMJcxdlvJ-SiTYrBlXe2aI1ux19LJ0K_eUC7Ma447urBpGxHo489PbVtFAKKoRMGP_KkpHuCefhqckCA"},"schema":"pubphys.envelope/1"},"record_hash":"316c65cff3d448b6835a5fe0d3c6263860b268b7d9bf5157ff20e9877ce5ed6e","leaf_index":192}