{"paper":{"title":"Active Model H: Scalar Active Matter in a Momentum-Conserving Fluid","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.stat-mech","physics.bio-ph","physics.flu-dyn"],"primary_cat":"cond-mat.soft","authors_text":"Adriano Tiribocchi, Davide Marenduzzo, Michael E. Cates, Raphael Wittkowski","submitted_at":"2015-04-28T12:32:22Z","abstract_excerpt":"We present a continuum theory of self-propelled particles, without alignment interactions, in a momentum-conserving solvent. To address phase separation we introduce a scalar concentration field $\\phi$ with advective-diffusive dynamics. Activity creates a contribution $\\Sigma_{ij}=-\\zeta((\\partial_i\\phi)(\\partial_j\\phi)-(\\nabla\\phi)^{2}\\delta_{ij}/d)$ to the deviatoric stress, where $\\zeta$ is odd under time reversal and $d$ is the number of spatial dimensions; this causes an effective interfacial tension contribution that is negative for contractile swimmers. We predict that domain growth the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.07447","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"}