{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"b74a0180bb5892038bdde67f667bd04b4f73d11b58a59167b454d0b3f546d9a5","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":["ai:gpt-5.5"],"kind":"seed"},"parents":["17fea577727dce1463a35a5f6a21d47a411419089673c746753adc319a973739","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"4279962f22ce4d181f85dc963d819098a5abdd1064fa2fe507fb889c5ff5cf24","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":["ai:gpt-5.5"],"external_id":"amo.macroscopic-optomechanics.csl-grw-test","kind":"well-posed","literature_status":"open","n":"2","parents":[],"plain":"Collapse models modify quantum mechanics so that large objects lose superpositions on their own. The original proposed rate has never been ruled out.","posed_since":"1986","precise":"Continuous spontaneous localization with rate $\\lambda$ and length $r_C$. Exclude $\\lambda = 10^{-16}\\ \\mathrm{s}^{-1}$ at $r_C = 10^{-5}\\ \\mathrm{cm}$ (the GRW value of Ghirardi, Rimini and Weber) by interferometric or non-interferometric (heating, noise) tests with massive objects. Answer: yes or no, with the excluded region in the $(\\lambda, r_C)$ plane.","problem_ref":"17fea577727dce1463a35a5f6a21d47a411419089673c746753adc319a973739","references":"","settled_by":"An interferometry or heating experiment whose excess-decoherence bound lies below $\\lambda$ = $10^{-16}$ $\\mathrm{s}^{-1}$ at $r_C$ = $10^{-5}$ cm.","status_note":"Non-interferometric tests (to 2021) constrain the enhanced Adler rates, and 2025 interference of sodium clusters above 170,000 amu (Pedalino et al., arXiv:2507.21211) tightened interferometric bounds; the GRW point is not reported excluded, which should be checked against the 2025 exclusion plot.","title":"Can massive superpositions exclude the GRW collapse rate?","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"9b3b27e042dd545f18dcd316ae5ce2f6a48d3287a5b82f0db15bc6fc9c415e6e","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"a60412121ca268abb6e86e0e309b635cb641d4747887b7587877ab8564fab3ee","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"YazFMeA4O7jvxhMM7HHt1_iKnYmdUOYSw4BTO-iUXKlXnBbUwUHWxWzH5hE_1UacNnxgsyQsze2qA81pKtjiBQ"},"schema":"pubphys.envelope/1"},"record_hash":"9b3b27e042dd545f18dcd316ae5ce2f6a48d3287a5b82f0db15bc6fc9c415e6e","leaf_index":2246}