{"schema":"pubphys.bundle/1","record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"66c05a71033b2d4ef32dd871f49292bc1deff605b813b4b547269a31685ee452","created":"2026-10-03T07:17:53Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"2828c8be40f3ea387d6a2abaeb1051de236565b4a03f3dadf19ea1973ab677ed","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"amo.anderson-localization-3d.random-laser-glassiness","kind":"phenomenon","literature_status":"contested","n":"1","parents":[],"plain":"Shot-to-shot fluctuations of random-laser spectra have been read as a sign of a glassy state like that of spin glasses, where many configurations compete. Whether this is a real phase of the coupled light modes or a misreading of ordinary fluctuations is disputed.","posed_since":"2015","precise":"The overlap distribution P(q) of shot-to-shot spectral intensity fluctuations in random lasers broadens above threshold, interpreted as replica symmetry breaking in a mean-field spin-glass model of nonlinearly coupled modes (Ghofraniha et al., Nature Communications 2015). Question: does a finite-mode, sparsely coupled, gain-saturated laser model have a thermodynamic replica-symmetry-breaking transition, and does the measured P(q) distinguish it from pump-noise-driven mode competition. An answer is a calculation for realistic mode coupling plus a control experiment that separates the two.","problem_ref":null,"references":"","settled_by":"A theory of P(q) for realistic random-laser mode coupling, tested against experiments varying mode number and pump stability.","status_note":"","title":"Is replica symmetry breaking in random lasers a true glass 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