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Our analysis reveals that these protected states emerge from a generic interplay between local nematic alignment and curvatu","authors_text":"Beno\\^it Mahault, Francesco Ginelli, Giuseppe Fava","cross_cats":[],"headline":"Dry active nematics under circular virtual confinement self-assemble into dense boundary rings that enclose a disordered core with self-selected density independent of global particle number.","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.soft","submitted_at":"2026-04-27T09:40:58Z","title":"Density-protected states in active matter under virtual confinement"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2604.24232","kind":"arxiv","version":2},"verdict":{"created_at":"2026-05-07T17:38:42.535271Z","id":"50b811d9-37ce-4eaf-a8d1-47e63b164135","model_set":{"reader":"grok-4.3"},"one_line_summary":"Dry active nematics under circular illumination self-assemble into a dense nematically ordered ring at the boundary that protects a disordered core with self-selected density independent of global density.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"Dry active nematics under circular virtual confinement self-assemble into dense boundary rings that enclose a disordered core with self-selected density independent of global particle number.","strongest_claim":"the system generically self-assembles into a dense, nematically ordered ring at the boundary of circular illumination patterns. 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