{"paper":{"title":"An agitated oscillator chain","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Coupling a harmonic oscillator chain to run-and-tumble particles creates self-sustained fluctuations with many-body Rayleigh-like dynamics.","cross_cats":[],"primary_cat":"cond-mat.stat-mech","authors_text":"Aaron Beyen, Christian Maes, Ion Santra","submitted_at":"2026-05-15T17:25:40Z","abstract_excerpt":"We study how the stationary dynamics of an oscillator chain is modified when coupled to a bath of run-and-tumble particles. First, assuming time-scale separation, we derive the induced Langevin chain dynamics with explicit expressions for the streaming term, friction coefficient, and noise amplitude. At high persistence of the run-and-tumble particle bath, the linear friction turns negative, creating an instability. Second, we find that this anti-damping is arrested at long times due to nonlinear effects, reminiscent of a Rayleigh oscillator. We conclude that a passive harmonic chain can be tr"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"A passive harmonic chain can be transformed by its coupling to active matter into a self-sustained fluctuating medium with many-body Rayleigh-like dynamics, resulting in pulsations of the displacements, spatial oscillations, and the emergence of persistence in velocities along the chain.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The derivation assumes time-scale separation between the fast run-and-tumble particle bath and the slower oscillator chain, allowing explicit averaging to obtain the induced Langevin dynamics with streaming term, friction coefficient, and noise amplitude.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Coupling a passive harmonic oscillator chain to a persistent run-and-tumble particle bath induces negative friction, instability, and nonlinear stabilization into many-body Rayleigh-like self-sustained dynamics with pulsations and velocity persistence.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Coupling a harmonic oscillator chain to run-and-tumble particles creates self-sustained fluctuations with many-body Rayleigh-like dynamics.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"55418f71a01e014b5a42462d441d94a7c6230dc40e2b3274d5e234da1ce31385"},"source":{"id":"2605.16209","kind":"arxiv","version":1},"verdict":{"id":"db67e507-aecd-45ec-9163-b2fe846609ce","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-19T18:37:51.696139Z","strongest_claim":"A passive harmonic chain can be transformed by its coupling to active matter into a self-sustained fluctuating medium with many-body Rayleigh-like dynamics, resulting in pulsations of the displacements, spatial oscillations, and the emergence of persistence in velocities along the chain.","one_line_summary":"Coupling a passive harmonic oscillator chain to a persistent run-and-tumble particle bath induces negative friction, instability, and nonlinear stabilization into many-body Rayleigh-like self-sustained dynamics with pulsations and velocity persistence.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The derivation assumes time-scale separation between the fast run-and-tumble particle bath and the slower oscillator chain, allowing explicit averaging to obtain the induced Langevin dynamics with streaming term, friction coefficient, and noise amplitude.","pith_extraction_headline":"Coupling a harmonic oscillator chain to run-and-tumble particles creates self-sustained fluctuations with many-body Rayleigh-like dynamics."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.16209/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"doi_title_agreement","ran_at":"2026-05-19T19:01:18.881430Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-19T18:51:21.825768Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"shingle_duplication","ran_at":"2026-05-19T17:49:44.676510Z","status":"skipped","version":"0.1.0","findings_count":0},{"name":"citation_quote_validity","ran_at":"2026-05-19T17:49:44.166330Z","status":"skipped","version":"0.1.0","findings_count":0},{"name":"ai_meta_artifact","ran_at":"2026-05-19T17:33:24.831521Z","status":"skipped","version":"1.0.0","findings_count":0},{"name":"external_links","ran_at":"2026-05-19T17:31:34.617756Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"cited_work_retraction","ran_at":"2026-05-19T17:22:06.942946Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"claim_evidence","ran_at":"2026-05-19T16:41:55.395866Z","status":"completed","version":"1.0.0","findings_count":0}],"snapshot_sha256":"63b95aaae0dab965bbf454acc32fc286b1677b24f9c45b15bee9bc5de573939c"},"references":{"count":83,"sample":[{"doi":"","year":1931,"title":"G. 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