{"schema":"pubphys.bundle/1","record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"a4e4df91856504c797bfb8a961fd61cbda065b032d1260c96c346fd385e9204c","created":"2026-10-03T07:17:53Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"980dbec967ca005486ac3c804c1753484d9c7e559d264e350472117c6c580b46","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"amo.cavity-photon-matter.cavity-spin-glass","kind":"well-posed","literature_status":"partially-resolved","n":"1","parents":[],"plain":"Atoms in a cavity with many light modes interact with random signs, like the frustrated magnets called spin glasses and like associative-memory networks. The question is whether they show the hallmark of a true spin glass.","posed_since":"","precise":"Transversely pumped atoms in a confocal multimode cavity realizing all-to-all couplings $J_{ij}$ with random signs (Sherrington-Kirkpatrick or Hopfield type). Measure the overlap distribution $P(q)$ between replicas (repeated preparations with the same $J_{ij}$) and determine whether it has continuous support (replica symmetry breaking) and whether it reflects equilibrium or a driven-dissipative steady state. The equilibrium Parisi solution is the comparison, not the question. Answer: $P(q)$ with an independent test of equilibration.","problem_ref":null,"references":"","settled_by":"Replica-overlap measurements across many disorder realizations with checks of fluctuation-dissipation relations.","status_note":"Replica symmetry breaking and an ultrametric overlap structure were observed in a driven-dissipative vector spin glass (Kroeze et al., Science 2025), and an Ising cavity spin glass was realized (Marsh et al., PRL 2025); the relation to equilibrium Parisi theory is open.","title":"Replica symmetry breaking in multimode-cavity spin 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