{"paper":{"title":"Diffusion approximation for Fokker Planck with heavy tail equilibria : a spectral method in dimension 1","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"math.AP","authors_text":"Gilles Lebeau, Marjolaine Puel","submitted_at":"2017-11-08T17:38:26Z","abstract_excerpt":"This paper is devoted to the diffusion approximation for the 1-d Fokker Planck equation with a heavy tail equilibria of the form (1+v^2)^{-\\beta/2}, in the range beta\\in ]1,5[. We prove that the limit diffusion equation involves a fractional Laplacian kappa|\\Delta|^{\\frac{\\beta+1}{6}}, and we compute the value of the diffusion coefficient kappa. This extends previous results of E. Nasreddine and M. Puel in the case beta>5, and of P. Cattiaux, E. Nasreddine and M. Puel in the case beta=5."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.03060","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}