{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"6e5c24f799f37fb41e51f82b4ce27a6e0c47740d8f0469c18d603a8a266529d6","created":"2026-10-03T07:18:04Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"d8c38c43fab08b3dc9ed160d0c1c85fc03530486a717729685e1cb85f47d29ab","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"grav.analog-hawking.bec-spontaneous-replication","kind":"well-posed","literature_status":"open","n":"1","parents":[],"plain":"One laboratory has reported that a flowing Bose-Einstein condensate (a gas cooled until its atoms move in lockstep) emits Hawking-like sound from quantum fluctuations alone. The question is whether a second, independent group sees the same emission with the predicted temperature.","posed_since":"2016","precise":"In a quasi-one-dimensional atomic BEC with a stationary sonic horizon (step potential or waterfall configuration), measure the equal-time density-density correlation G2(x, x') and extract the Hawking-partner correlation band across the horizon and its Fourier spectrum. An answer is an observation by a group other than the Technion group at high statistical significance of a stationary correlation band whose spectrum matches $T_{H}=\\hbar \\kappa/(2\\pi)$ for the measured $\\kappa$, with stimulated contributions (initial thermal phonons, black-hole-laser amplification, Bogoliubov-Cherenkov emission from obstacles) quantitatively excluded.","problem_ref":null,"references":"","settled_by":"An independent atomic-BEC experiment reproducing the stationary Hawking correlation band and its spectrum with a measured surface gravity.","status_note":"Spontaneous emission has been reported only by Steinhauer's group (2016, 2019, and a 2021 stationarity study); to the extent checked, no independent atomic-BEC replication is reported as of 2026.","title":"Independent replication of spontaneous Hawking radiation in an atomic condensate","topic_ref":"4f72aa7f49ff2207b153ba914ff04aca2adf093119262ec376588bbea7b4ba32"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"1e520941ef0d091b532d9e56fff8dd05309fe28892767506cbe8552500474a4f","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"686779ad499ea84f352fb46bf47dd0e3c5e65b6d933c91a8340f477b44dcdb98","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"yvqGVk9LGcAJc4wgjg4ZebjxALv9pAd2JYMbExeLLKGPrqJI1dRCdK3mK3iTgA5VlQgbWGC-JG8mtW-xXCUkAA"},"schema":"pubphys.envelope/1"},"record_hash":"1e520941ef0d091b532d9e56fff8dd05309fe28892767506cbe8552500474a4f","leaf_index":1459}