{"paper":{"title":"Semi-Markovian Dynamics of a Self-Propelled Particle in a Confined Environment: A Large-Deviation Study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Aging strength in phase switches controls whether velocity fluctuations of a confined self-propelled particle undergo first-order or second-order dynamical phase transitions.","cross_cats":[],"primary_cat":"cond-mat.stat-mech","authors_text":"Farhad H. Jafarpour, Shabnam Sohrabi","submitted_at":"2026-04-06T11:18:53Z","abstract_excerpt":"We study the large deviations of the time-integrated current for a self-propelled particle moving within a confined environment. The dynamics is modeled as a semi-Markovian process, where the transitions between a \\textit{normal running phase} (Phase $0$) and a \\textit{wall-attached phase} (Phase $1$) are governed by time-dependent reset probabilities. We study two different examples: In the first case, the particle undergoes a biased random walk in Phase $0$, while it intermittently resets and interacts with the container boundaries, remaining stationary in Phase $1$. In this scenario, the re"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"Depending on the aging strength, the system exhibits either discontinuous (first-order) or continuous (second-order) DPTs in the fluctuations of the particle velocity.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The transitions between the normal running phase and wall-attached phase are governed by time-dependent reset probabilities that follow an aging logic, with analysis performed in the long-time limit of the scaled cumulant generating function.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"In a semi-Markovian model of a confined self-propelled particle, aging strength in phase-transition probabilities determines whether velocity fluctuations undergo discontinuous or continuous dynamical phase transitions.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Aging strength in phase switches controls whether velocity fluctuations of a confined self-propelled particle undergo first-order or second-order dynamical phase transitions.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"1f3ce71ddf1f3c9e98ae5e78f4988567db9d7e2601c061f3fbd345168a79d936"},"source":{"id":"2604.04595","kind":"arxiv","version":1},"verdict":{"id":"0a7f9291-9138-4a09-8594-90273f3d4b7a","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-10T20:31:36.248808Z","strongest_claim":"Depending on the aging strength, the system exhibits either discontinuous (first-order) or continuous (second-order) DPTs in the fluctuations of the particle velocity.","one_line_summary":"In a semi-Markovian model of a confined self-propelled particle, aging strength in phase-transition probabilities determines whether velocity fluctuations undergo discontinuous or continuous dynamical phase transitions.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The transitions between the normal running phase and wall-attached phase are governed by time-dependent reset probabilities that follow an aging logic, with analysis performed in the long-time limit of the scaled cumulant generating function.","pith_extraction_headline":"Aging strength in phase switches controls whether velocity fluctuations of a confined self-propelled particle undergo first-order or second-order dynamical phase transitions."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.04595/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":17,"sample":[{"doi":"","year":2021,"title":"H. Du, W. Xu, Z. Zhang, X. Han, Bacterial Behavior in Confined Spaces, Front. Cell Dev. Biol. 9 (2021) 629820","work_id":"31f5e9a4-0453-49f9-8f7f-dff164459aaa","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2014,"title":"V. Kantsler, J. Dunkel, M. Blayney, R.E. Goldstein, Rheotaxis facilitates upstream navigation of mammalian sperm cells, eLife 3 (2014) e02403","work_id":"e1f12140-1fe2-419e-a185-07f8d18a91f2","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2012,"title":"Marcos, H.C. Fu, T.R. Powers, R. Stocker, Bacterial rheotaxis, Proc. Natl. Acad. Sci. U.S.A. 109 (2012) 4780–4785","work_id":"d3527311-7e3b-4fe4-aaaf-41d77dfe2f23","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2014,"title":"M. Molaei, M. Barry, R. Stocker, J. Sheng, Failed escape: solid surfaces prevent tumbling of Escherichia coli, Phys. Rev. Lett. 113 (2014) 068103","work_id":"02a720aa-7e57-4b67-bc0d-df2e84fc1636","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2020,"title":"N. Figueroa-Morales, A. Rivera, R. Soto, A. Lindner, E. Altshuler, ´E. Cl´ ement, E. coli ”super-contaminates” narrow ducts fostered by broad run- time distribution, Sci. Adv. 6 (2020) eaay0155","work_id":"d626b9d1-3436-4b40-a28f-dc83fea1d053","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":17,"snapshot_sha256":"243cacb076c1daeee1de0b09e24dfa29ed015f923ea612e2687b31c893d93531","internal_anchors":0},"formal_canon":{"evidence_count":2,"snapshot_sha256":"7f347e6249cc07bd830eaa8395a7ca42c492ab7f59ee8286fc105a2b13b5d273"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}