{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"3168d85c262a827fd9602ee5f0f96cc4519394f62406af00a8d8aa53cbcb10a0","created":"2026-10-03T07:17:53Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"3c6784870585c24be98d0ebe286f82395495725c77ae642620303016ac36fcf3","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"mechanism","assisted_by":[],"external_id":"amo.anderson-localization-3d.random-laser-modes","kind":"phenomenon","literature_status":"open","n":"1","parents":[],"plain":"A random laser has no mirrors: light bounces among random scatterers in a material with gain until it lases. A theory that predicts how many modes lase, what they look like and how their output fluctuates from shot to shot is still missing.","posed_since":"","precise":"Multimode random laser with saturable gain in a disordered medium of scattering mean free path l, size $L >> l$, from the diffusive regime ($kl >> 1$, $k$ the wavenumber) toward localization. Quantities: number of lasing modes versus pump, their spatial profiles and the shot-to-shot emission statistics (including Levy-type heavy tails). SALT (steady-state ab initio laser theory) solves single disorder realizations; an answer is an ensemble theory that predicts these statistics with no fitted parameters and is checked against an experiment with characterized disorder.","problem_ref":null,"references":"","settled_by":"Comparison of measured mode number, spectra and intensity statistics in a sample of known l and gain with ensemble-averaged first-principles laser simulations.","status_note":"","title":"First-principles statistics of lasing modes in random lasers","topic_ref":"bc11afe41898d1fca110e69c7ca3a2305936041c4a0223c9dc11cbf47acacf74"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"a51fde3907644435ad7b88fb9a7b250a4351232bc18e7abf3f64b2de7eda91a8","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"4de38687f333b72ce06e4ec9e96f65c145eac1e764a6bc17f5f6ef3953d208cc","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"jZozIcBnyDzUXecPqD3NpGYqKmaia0Dt5rwl8NtUmBQVfhqkMIy-EXdML--B72T0slpAtWdpszfHQK3VcgfkDg"},"schema":"pubphys.envelope/1"},"record_hash":"a51fde3907644435ad7b88fb9a7b250a4351232bc18e7abf3f64b2de7eda91a8","leaf_index":367}