{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"9a41ecb27ba68b891dbba16e33fdb04fe79754e972bbafb2689860ad26169738","created":"2026-10-03T07:17:54Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"91237751433165257f2590da344f59a3d168ee588c56a894522525b750adf343","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"mechanism","assisted_by":[],"external_id":"amo.ultracold-molecules.atom-molecule-resonances","kind":"phenomenon","literature_status":"partially-resolved","n":"1","parents":[],"plain":"When ultracold atoms collide with ultracold molecules, the loss rate spikes at certain magnetic fields. Whether these spikes come from loosely bound long-range states or from the tangled short-range states of the three-atom complex is debated.","posed_since":"2019","precise":"Collisions of ground-state bialkali molecules with atoms (for example NaK + K, NaLi + Na) show isolated magnetic Feshbach resonances (Yang et al., Science 2019). Determine whether their positions, widths and density arise from long-range states of the atom-molecule pair (Frye and Hutson, Phys. Rev. Research 2023) or from the dense, chaotic short-range spectrum of the triatomic complex. Answer: a model that predicts resonance positions for a new atom-molecule pair before measurement.","problem_ref":null,"references":"","settled_by":"Advance prediction and subsequent measurement of resonance positions and widths in a previously unmeasured atom-molecule system.","status_note":"Frye and Hutson (2023, doi:10.1103/PhysRevResearch.5.023001) attributed observed resonances to long-range states; independent predictive tests are lacking.","title":"Which states produce Feshbach resonances in ultracold atom-molecule collisions?","topic_ref":"1fb1ed324ce6795edc9bd20f140c48402fb8e9474fb20636a6be3feb50ae65e2"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"b6e94b4ad8aeae8bc7e64ea2b7f735f6e9cd387ad54ff2ae07ad9c55f1202cef","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"2390a607f8ea144b23386b52891b50ba56489e70bc2b8258d03fbdb82a50549a","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"sp2gaQA1bzhhvmDpxPATqMWPveALBeolnxx6ZbPPx0N2qoi26WnCtXRI1S8Ad4T9t7YfLxMCQdJr73uTu-1lDA"},"schema":"pubphys.envelope/1"},"record_hash":"b6e94b4ad8aeae8bc7e64ea2b7f735f6e9cd387ad54ff2ae07ad9c55f1202cef","leaf_index":463}