{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"1ea9898ea03e8d13b92cae22e7a5682f62f2e8704a9c131b5a466050d0466134","created":"2026-10-03T07:18:09Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"6bfdb97343488050087b6b7ad658e4f6346bd36681f945bbbf9eab8b3805f1f6","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"qft.string-vacua.ds-vacua-existence","kind":"well-posed","literature_status":"contested","n":"1","parents":[],"plain":"Our universe has a small positive vacuum energy. Whether string theory has a calculable solution of this kind that lives long enough is disputed.","posed_since":"2003","precise":"Determine whether there exist solutions of string theory, with $\\alpha'$ and $g_s$ corrections under control, whose 4D effective potential has a local minimum with $V > 0$ and lifetime longer than the Hubble time, such as KKLT or Large Volume Scenario constructions in type IIB orientifolds with anti-D3-brane uplift.","problem_ref":null,"references":"","settled_by":"An explicit compactification with all corrections shown to be parametrically small, or a no-go theorem covering the controlled regimes.","status_note":"McAllister, Moritz, Nally and Schachner (2024) constructed explicit candidate KKLT de Sitter vacua at leading order in $\\alpha'$ and $g_s$; control of higher corrections is disputed.","title":"Does string theory have controlled metastable de Sitter vacua","topic_ref":"925c6562a6d5b6dc4a9070f6df384c4141e0b53a77a35c230ef4f29c1888453c"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"c54e2c464a3c3926029d0e81cc6b59c76ad178bcc1537aa9af0f2a2bdc560180","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"a5200aa33b3cf81d9241dac82dd2ad15bde5d7a3c0547e33690ad6125eaad5a6","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"V9Tbc1tGIGCH0x-SRUCKiYu7WXAB1WAE-RpFCTabEnYok9RCk3Jln8S8tgj3C8zrcqNWln_GG-VG4IWSYedACA"},"schema":"pubphys.envelope/1"},"record_hash":"c54e2c464a3c3926029d0e81cc6b59c76ad178bcc1537aa9af0f2a2bdc560180","leaf_index":1958}