{"file":[{"success":1,"date_updated":"2026-02-24T07:23:32Z","file_id":"21353","relation":"main_file","checksum":"8402f322f8f0e858b1d9aac57e306e31","file_name":"2026_ScienceAdv_Bubis.pdf","date_created":"2026-02-24T07:23:32Z","content_type":"application/pdf","creator":"dernst","file_size":2775975,"access_level":"open_access"}],"author":[{"full_name":"Bubis, Anton","first_name":"Anton","last_name":"Bubis","id":"1f6212b5-f795-11ec-9c0c-de4780302890"},{"last_name":"Vigliotti","id":"539e1e1a-e604-11ee-a1df-f02b018e5c8c","first_name":"Lucia","full_name":"Vigliotti, Lucia"},{"full_name":"Serbyn, Maksym","orcid":"0000-0002-2399-5827","first_name":"Maksym","id":"47809E7E-F248-11E8-B48F-1D18A9856A87","last_name":"Serbyn"},{"id":"4AD6785A-F248-11E8-B48F-1D18A9856A87","last_name":"Higginbotham","orcid":"0000-0003-2607-2363","full_name":"Higginbotham, Andrew P","first_name":"Andrew P"}],"type":"journal_article","publication_status":"published","OA_place":"publisher","language":[{"iso":"eng"}],"publisher":"American Association for the Advancement of Science","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","corr_author":"1","doi":"10.1126/sciadv.ady7222","year":"2026","intvolume":"        12","date_published":"2026-02-13T00:00:00Z","day":"13","DOAJ_listed":"1","oa_version":"Published Version","article_processing_charge":"Yes","title":"Non-equilibrium plasmon liquid in a Josephson junction chain","publication_identifier":{"eissn":["2375-2548"]},"PlanS_conform":"1","issue":"7","tmp":{"short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","image":"/images/cc_by.png"},"arxiv":1,"publication":"Science Advances","_id":"21340","department":[{"_id":"MaSe"},{"_id":"AnHi"},{"_id":"GeKa"}],"date_created":"2026-02-22T20:47:38Z","ddc":["530"],"volume":12,"oa":1,"acknowledged_ssus":[{"_id":"NanoFab"},{"_id":"M-Shop"}],"external_id":{"arxiv":["2504.09721"]},"article_type":"original","has_accepted_license":"1","month":"02","abstract":[{"lang":"eng","text":"Equilibrium quantum systems are often described by a gas of weakly interacting normal modes. Bringing such systems far from equilibrium, however, can drastically enhance mode-to-mode interactions. Understanding the resulting liquid is a fundamental question for quantum statistical mechanics and a practical question for engineering driven quantum devices. To tackle this question, we probe the non-equilibrium kinetics of one-dimensional plasmons in a long chain of Josephson junctions. We introduce multimode spectroscopy to controllably study the departure from equilibrium, witnessing the evolution from pairwise coupling between plasma modes at weak driving to dramatic, high-order, cascaded couplings at strong driving. Scaling to many-mode drives, we stimulate interactions between hundreds of modes, resulting in near-continuum internal dynamics. Imaging the resulting non-equilibrium plasmon populations, we then resolve the nonlocal redistribution of energy in the response to a weak perturbation—an explicit verification of the emergence of a strongly interacting, non-equilibrium liquid of plasmons."}],"status":"public","quality_controlled":"1","OA_type":"gold","acknowledgement":"We thank V. Vitelli, M. Fruchart, and A. Burshstein for helpful input. We acknowledge technical support from the Nanofabrication Facility and the MIBA machine shop at IST Austria. This research was supported in part by grant NSF PHY-2309135 to the Kavli Institute for Theoretical Physics (KITP), by the Austrian Science Fund (FWF) SFB F86, and by the NOMIS foundation.","date_updated":"2026-02-24T07:25:34Z","citation":{"chicago":"Bubis, Anton, Lucia Vigliotti, Maksym Serbyn, and Andrew P Higginbotham. “Non-Equilibrium Plasmon Liquid in a Josephson Junction Chain.” <i>Science Advances</i>. American Association for the Advancement of Science, 2026. <a href=\"https://doi.org/10.1126/sciadv.ady7222\">https://doi.org/10.1126/sciadv.ady7222</a>.","ista":"Bubis A, Vigliotti L, Serbyn M, Higginbotham AP. 2026. Non-equilibrium plasmon liquid in a Josephson junction chain. Science Advances. 12(7), eady7222.","apa":"Bubis, A., Vigliotti, L., Serbyn, M., &#38; Higginbotham, A. P. (2026). Non-equilibrium plasmon liquid in a Josephson junction chain. <i>Science Advances</i>. American Association for the Advancement of Science. <a href=\"https://doi.org/10.1126/sciadv.ady7222\">https://doi.org/10.1126/sciadv.ady7222</a>","short":"A. Bubis, L. Vigliotti, M. Serbyn, A.P. Higginbotham, Science Advances 12 (2026).","ieee":"A. Bubis, L. Vigliotti, M. Serbyn, and A. P. Higginbotham, “Non-equilibrium plasmon liquid in a Josephson junction chain,” <i>Science Advances</i>, vol. 12, no. 7. American Association for the Advancement of Science, 2026.","ama":"Bubis A, Vigliotti L, Serbyn M, Higginbotham AP. Non-equilibrium plasmon liquid in a Josephson junction chain. <i>Science Advances</i>. 2026;12(7). doi:<a href=\"https://doi.org/10.1126/sciadv.ady7222\">10.1126/sciadv.ady7222</a>","mla":"Bubis, Anton, et al. “Non-Equilibrium Plasmon Liquid in a Josephson Junction Chain.” <i>Science Advances</i>, vol. 12, no. 7, eady7222, American Association for the Advancement of Science, 2026, doi:<a href=\"https://doi.org/10.1126/sciadv.ady7222\">10.1126/sciadv.ady7222</a>."},"file_date_updated":"2026-02-24T07:23:32Z","article_number":"eady7222"}