{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:LKDQC77UI56MTMS3FDYMSFTO5W","short_pith_number":"pith:LKDQC77U","schema_version":"1.0","canonical_sha256":"5a87017ff4477cc9b25b28f0c9166eedbe0eb559e29858271805e2765ec3705b","source":{"kind":"arxiv","id":"2507.10649","version":2},"attestation_state":"computed","paper":{"title":"The Baby Universe is Fine and the CFT Knows It: On Holography for Closed Universes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","quant-ph"],"primary_cat":"hep-th","authors_text":"Alejandro Vilar L\\'opez, Brian Swingle, Martin Sasieta, Pratik Rath, Stefano Antonini","submitted_at":"2025-07-14T18:00:00Z","abstract_excerpt":"Big bang/big crunch closed universes can be realized in AdS/CFT, even though they lack asymptotically AdS boundaries. With enough bulk entanglement, the bulk Hilbert space of a closed universe can be holographically encoded in the CFT. We clarify the relation of this encoding to observer-clone proposals and refute recent arguments about the breakdown of semiclassical physics in such spaces. In the limit of no bulk entanglement, the holographic encoding breaks down. The oft-cited one-dimensional nature of the closed universe Hilbert space represents the limitation of the external (CFT) Hilbert "},"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":"2507.10649","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2025-07-14T18:00:00Z","cross_cats_sorted":["gr-qc","quant-ph"],"title_canon_sha256":"b90068a20a76c97b4378370fb2553224917201b7f6cc80938afa98a99ab09acf","abstract_canon_sha256":"5d2721617935516a1114b6c69d6ef73ce5bd20cb9011a5795474c608ee76914e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:50:38.409801Z","signature_b64":"f7v/05Fbs3MRdy7r91R85yAji/3l4jkON9JJYfvMzlqFoGBUCtbJLYFvfplqJonj9XKcG6M5DVOElWIGk56NDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5a87017ff4477cc9b25b28f0c9166eedbe0eb559e29858271805e2765ec3705b","last_reissued_at":"2026-07-05T11:50:38.409369Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:50:38.409369Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Baby Universe is Fine and the CFT Knows It: On Holography for Closed Universes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","quant-ph"],"primary_cat":"hep-th","authors_text":"Alejandro Vilar L\\'opez, Brian Swingle, Martin Sasieta, Pratik Rath, Stefano Antonini","submitted_at":"2025-07-14T18:00:00Z","abstract_excerpt":"Big bang/big crunch closed universes can be realized in AdS/CFT, even though they lack asymptotically AdS boundaries. With enough bulk entanglement, the bulk Hilbert space of a closed universe can be holographically encoded in the CFT. We clarify the relation of this encoding to observer-clone proposals and refute recent arguments about the breakdown of semiclassical physics in such spaces. In the limit of no bulk entanglement, the holographic encoding breaks down. The oft-cited one-dimensional nature of the closed universe Hilbert space represents the limitation of the external (CFT) Hilbert "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.10649","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2507.10649/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2507.10649","created_at":"2026-07-05T11:50:38.409424+00:00"},{"alias_kind":"arxiv_version","alias_value":"2507.10649v2","created_at":"2026-07-05T11:50:38.409424+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.10649","created_at":"2026-07-05T11:50:38.409424+00:00"},{"alias_kind":"pith_short_12","alias_value":"LKDQC77UI56M","created_at":"2026-07-05T11:50:38.409424+00:00"},{"alias_kind":"pith_short_16","alias_value":"LKDQC77UI56MTMS3","created_at":"2026-07-05T11:50:38.409424+00:00"},{"alias_kind":"pith_short_8","alias_value":"LKDQC77U","created_at":"2026-07-05T11:50:38.409424+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":12,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2606.28484","citing_title":"Subregion observer rules from generalized entanglement wedges","ref_index":58,"is_internal_anchor":false},{"citing_arxiv_id":"2605.13956","citing_title":"q-Askey Deformations of Double-Scaled SYK","ref_index":161,"is_internal_anchor":false},{"citing_arxiv_id":"2509.15295","citing_title":"Living on the edge: a non-perturbative resolution to the negativity of bulk entropies","ref_index":19,"is_internal_anchor":false},{"citing_arxiv_id":"2510.02997","citing_title":"Quantum corrected black hole microstates and entropy","ref_index":18,"is_internal_anchor":false},{"citing_arxiv_id":"2601.10906","citing_title":"Menagerie of Euclidean constructions for 3D holographic cosmologies","ref_index":23,"is_internal_anchor":false},{"citing_arxiv_id":"2602.15120","citing_title":"How to have your wormholes and factorize, too","ref_index":29,"is_internal_anchor":false},{"citing_arxiv_id":"2602.23432","citing_title":"A Menagerie of Wormholes and Cosmologies in the Gravitational Path Integral","ref_index":56,"is_internal_anchor":false},{"citing_arxiv_id":"2605.13956","citing_title":"q-Askey Deformations of Double-Scaled SYK","ref_index":161,"is_internal_anchor":false},{"citing_arxiv_id":"2605.05291","citing_title":"Baby Universe in a Coupled SYK Model","ref_index":27,"is_internal_anchor":false},{"citing_arxiv_id":"2604.10267","citing_title":"The yes boundaries wavefunctions of the universe","ref_index":76,"is_internal_anchor":false},{"citing_arxiv_id":"2605.06780","citing_title":"A Semiclassical Diagnostic for Spacetime Emergence","ref_index":69,"is_internal_anchor":false},{"citing_arxiv_id":"2604.14387","citing_title":"Emergent States and Algebras from the Double-Scaling limit of Pure States in SYK","ref_index":6,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/LKDQC77UI56MTMS3FDYMSFTO5W","json":"https://pith.science/pith/LKDQC77UI56MTMS3FDYMSFTO5W.json","graph_json":"https://pith.science/api/pith-number/LKDQC77UI56MTMS3FDYMSFTO5W/graph.json","events_json":"https://pith.science/api/pith-number/LKDQC77UI56MTMS3FDYMSFTO5W/events.json","paper":"https://pith.science/paper/LKDQC77U"},"agent_actions":{"view_html":"https://pith.science/pith/LKDQC77UI56MTMS3FDYMSFTO5W","download_json":"https://pith.science/pith/LKDQC77UI56MTMS3FDYMSFTO5W.json","view_paper":"https://pith.science/paper/LKDQC77U","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2507.10649&json=true","fetch_graph":"https://pith.science/api/pith-number/LKDQC77UI56MTMS3FDYMSFTO5W/graph.json","fetch_events":"https://pith.science/api/pith-number/LKDQC77UI56MTMS3FDYMSFTO5W/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/LKDQC77UI56MTMS3FDYMSFTO5W/action/timestamp_anchor","attest_storage":"https://pith.science/pith/LKDQC77UI56MTMS3FDYMSFTO5W/action/storage_attestation","attest_author":"https://pith.science/pith/LKDQC77UI56MTMS3FDYMSFTO5W/action/author_attestation","sign_citation":"https://pith.science/pith/LKDQC77UI56MTMS3FDYMSFTO5W/action/citation_signature","submit_replication":"https://pith.science/pith/LKDQC77UI56MTMS3FDYMSFTO5W/action/replication_record"}},"created_at":"2026-07-05T11:50:38.409424+00:00","updated_at":"2026-07-05T11:50:38.409424+00:00"}