{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"70782ce9042fd30d13212092cbcb654737d13879ad2f73b7e23cf4e7c0bb40f1","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["c54e2c464a3c3926029d0e81cc6b59c76ad178bcc1537aa9af0f2a2bdc560180","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"9057feab7ed7b9e60ea5c5ae37c30035505f1ab1c3f4ba555362baa574169518","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":"2","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":"c54e2c464a3c3926029d0e81cc6b59c76ad178bcc1537aa9af0f2a2bdc560180","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":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"eedf795734750f67c0c5ae2024cce81166ed23fd6b71f60d73f7656081cdc399","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"29dd6a1d1daa6bc1d9fdbdd5c064fa8dcce0e7263c67d337d205e368ffa49cd1","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"Dl_4C9i0PCmdo2PuKcJAR6bpRozjsCAEJXA3DgDzO1YfLPNOSC3IM8XQW3gqlPkF0f3BrsVV-ne8IgP2JjwlBg"},"schema":"pubphys.envelope/1"},"record_hash":"eedf795734750f67c0c5ae2024cce81166ed23fd6b71f60d73f7656081cdc399","leaf_index":3684}