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We first characterize the dynamical regimes emerging from the interplay of these two driving mechanisms under perfectly reflective or smooth boundary conditions. We then introduce boundary friction and observe a drastic change in the accumulation patterns, with dynamical phases that are absent in the previous case. By connecting emergent macroscopic structures to their underlying interactions, this work provides a practical route to infer the dominant microscopic mechanism ruling boundary-mediated collective behavior, with potential applications ranging from single-cell migration to bioinspired robotics.<\/jats:p>","DOI":"10.1103\/2l84-9hg3","type":"journal-article","created":{"date-parts":[[2026,8,11]],"date-time":"2026-08-11T17:04:56Z","timestamp":1786467896000},"update-policy":"https:\/\/doi.org\/10.1103\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Boundary-mediated phases of self-propelled Kuramoto particles"],"prefix":"10.1103","volume":"114","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6004-3721","authenticated-orcid":true,"given":"Francesco","family":"Arceri","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/00z34yn88","id-type":"ROR","asserted-by":"publisher"}],"name":"INFN, Sezione di 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