{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"ac75ba9f5fd6f217f486f0f8c6942b149e3a52db916ebb6e083495cf1bdaeff5","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["caca05118b75962c6d50d87d66ca34bd7aba2cb204f1c96e97912487f1ce95ba","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"e5bde1cb3321dd6f3a4e80514df6b102e778d5c4ee3afbd0722ad0c89ca14b26","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"qi.collapse-models.markovian-csl-window","kind":"well-posed","literature_status":"partially-resolved","n":"2","parents":[],"plain":"The best-studied collapse model, continuous spontaneous localization (CSL), has two numbers: how often collapse happens and over what distance. In 2025 a dark-matter detector excluded the originally proposed values; the question is whether any values remain that still collapse visible objects fast enough.","posed_since":"1990","precise":"Markovian (white-noise) CSL has collapse rate $\\lambda$ and correlation length $r_{C}$. X-ray spontaneous emission in XENONnT gives $\\lambda / r_{C}^{2} < 3.0 \\times 10^{-7}\\,\\mathrm{s}^{-1}\\,\\mathrm{cm}^{-2}$ (90 percent C.L.) for $r_{C}$ below about $10^{-3}\\,\\mathrm{cm}$; mechanical and interferometric bounds cover larger $r_{C}$. Theoretical lower bounds require collapse of a barely visible object within about $10^{-2}\\,\\mathrm{s}$. Determine whether the region between experimental upper bounds and theoretical lower bounds is empty for all $r_{C}$.","problem_ref":"caca05118b75962c6d50d87d66ca34bd7aba2cb204f1c96e97912487f1ce95ba","references":"","settled_by":"Spontaneous-radiation, heating and interferometric bounds that, with an agreed macroscopic-collapse criterion, exclude or leave open a region of the $(\\lambda, r_C)$ plane.","status_note":"XENONnT (Phys. Rev. Lett. 136, 120201, 2026) excluded the GRW values $\\lambda = 10^{-16}\\ \\mathrm{s}^{-1}$, $r_{C} = 10^{-5}\\ \\mathrm{cm}$ at $9.1\\sigma$, improving the previous X-ray bound about 135-fold.","title":"Does any parameter window of white-noise CSL remain viable?","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"1b46befa196fed68ee0d634c191cdb10590fcc048ec92ca812e844e376b2d7d3","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"b67edd057481f85f47e1e9fa812bd7283e2cf10eb691a8d635b0234fa3f98383","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"YtsRGopqe5PMR2z6tEYfjYR1ZZ4h2Oo-tJi4b-bnVrmnDxAQgpGqiVd8xpKLD9Ely0dnQ8cL88DjgpXdtoNFAg"},"schema":"pubphys.envelope/1"},"record_hash":"1b46befa196fed68ee0d634c191cdb10590fcc048ec92ca812e844e376b2d7d3","leaf_index":3700}