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However, experimentally accessing these abnormal regimes is quite challenging mainly because many real-world systems displaying synchronization become fragile under strong forcing. Here, we are able to observe these intriguing regimes in a breathing-soliton laser. Two types of abnormal synchronization regions are unveiled, namely, a leaf- and a ray-like shape. High-resolution control of the loss allows holes to be revealed in the synchronization regions. Our work opens the possibility to study intriguing synchronization dynamics using a simple breathing-soliton laser as a test bed.<\/jats:p>","DOI":"10.1126\/sciadv.ads3660","type":"journal-article","created":{"date-parts":[[2025,3,21]],"date-time":"2025-03-21T18:22:12Z","timestamp":1742581332000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":20,"title":["Unveiling the complexity of Arnold\u2019s tongues in a breathing-soliton laser"],"prefix":"10.1126","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-4360-3242","authenticated-orcid":true,"given":"Xiuqi","family":"Wu","sequence":"first","affiliation":[{"name":"State Key Laboratory of Precision Spectroscopy, and Hainan Institute, East China Normal University, Shanghai 200062, China."},{"name":"Chongqing Key Laboratory of Precision Optics, Chongqing Institute of East China Normal University, Chongqing 401120, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1432-5880","authenticated-orcid":true,"given":"Junsong","family":"Peng","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Precision Spectroscopy, and Hainan Institute, East China Normal University, Shanghai 200062, China."},{"name":"Chongqing Key Laboratory of Precision Optics, Chongqing Institute of East China Normal University, Chongqing 401120, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-8106-5813","authenticated-orcid":true,"given":"Bo","family":"Yuan","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Precision Spectroscopy, and Hainan Institute, East China Normal University, Shanghai 200062, China."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5388-2893","authenticated-orcid":true,"given":"Sonia","family":"Boscolo","sequence":"additional","affiliation":[{"name":"Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, UK."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0755-5995","authenticated-orcid":true,"given":"Christophe","family":"Finot","sequence":"additional","affiliation":[{"name":"Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS \u2013 Universit\u00e9 de Bourgogne Franche-Comt\u00e9, F-21078 Dijon Cedex, France."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2357-4440","authenticated-orcid":true,"given":"Heping","family":"Zeng","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Precision Spectroscopy, and Hainan Institute, East China Normal University, Shanghai 200062, China."},{"name":"Chongqing Key Laboratory of Precision Optics, Chongqing Institute of East China Normal University, Chongqing 401120, China."},{"name":"Shanghai Research Center for Quantum Sciences, Shanghai 201315, China."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"221","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"crossref","unstructured":"A. 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