[{"date_created":"2026-10-02T08:33:31Z","date_published":"2026-10-01T00:00:00Z","oa":1,"researchdata_availability":"yes","year":"2026","status":"public","PlanS_conform":"1","intvolume":"       114","type":"journal_article","issue":"19","fulldoi":"https://doi.org/10.1103/cw3m-thsw","arxiv":1,"publication_status":"published","tmp":{"image":"/images/cc_by.png","short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"publication":"Physical Review B","supplementarymaterial":"yes","volume":114,"OA_type":"hybrid","article_type":"original","file":[{"success":1,"content_type":"application/pdf","file_id":"23069","creator":"dernst","file_size":2531016,"file_name":"2026_PhysicalReviewB_Vigliotti.pdf","access_level":"open_access","date_created":"2026-10-07T09:39:01Z","checksum":"95db327e1005564d09334763789ad7ae","date_updated":"2026-10-07T09:39:01Z","relation":"main_file"}],"quality_controlled":"1","author":[{"id":"539e1e1a-e604-11ee-a1df-f02b018e5c8c","last_name":"Vigliotti","full_name":"Vigliotti, Lucia","first_name":"Lucia"},{"id":"4AD6785A-F248-11E8-B48F-1D18A9856A87","last_name":"Higginbotham","orcid":"0000-0003-2607-2363","first_name":"Andrew P","full_name":"Higginbotham, Andrew P"},{"first_name":"Maksym","full_name":"Serbyn, Maksym","last_name":"Serbyn","orcid":"0000-0002-2399-5827","id":"47809E7E-F248-11E8-B48F-1D18A9856A87"}],"day":"01","OA_place":"publisher","das_tickbox":"1","license":"https://creativecommons.org/licenses/by/4.0/","title":"Plasmon decay and nonequilibrium steady states in Josephson junction chains","date_updated":"2026-10-07T09:42:41Z","ddc":["530"],"_id":"23029","publisher":"American Physical Society","external_id":{"arxiv":["2603.06371"]},"acknowledgement":"We acknowledge useful discussions with Anton Bubis, Vladimir Manucharyan, Alexander Mirlin, and Thomas Scaffidi. We are grateful to Eli Levenson-Falk and Alexander Mirlin for their feedback on the manuscript. This research was supported in part by Grant NSF PHY-2309135 to the Kavli Institute for Theoretical Physics (KITP), and by the Austrian Science Fund (FWF) SFB F86.","corr_author":"1","department":[{"_id":"MaSe"},{"_id":"AnHi"}],"has_accepted_license":"1","article_processing_charge":"Yes (via OA deal)","abstract":[{"lang":"eng","text":"Josephson junction (JJ) chains combine the coherence of superconductivity with the controllability of microwave-frequency circuits, making them a powerful platform for circuit quantum electrodynamics. In this work, we consider a long JJ chain that effectively realizes a multimode cavity with nonlinear dispersion and additional multimode interactions. Individual modes appearing due to the finite size of the chain can be experimentally probed via microwave spectroscopy, both in equilibrium and in driven far-from-equilibrium settings. We study the role of multimode interactions in degrading internal coherence—observable as excess linewidth—in both equilibrium and driven regimes. Focusing on two-into-two mode scattering as the leading relaxation process, we classify the relevant scattering processes and derive their expected temperature- and frequency-scaling under equilibrium conditions. For experimentally relevant parameters, we show that the equilibrium decay rate is dominated by nonresonant processes, however, weakly driving a particular set of modes out of equilibrium enhances resonant scattering, leading to observable signatures in the distribution function and linewidth. Finally, in the strong nonequilibrium regime, we report a crossover to a qualitatively different nonequilibrium steady state."}],"publication_identifier":{"issn":["2469-9950"],"eissn":["2469-9969"]},"file_date_updated":"2026-10-07T09:39:01Z","citation":{"mla":"Vigliotti, Lucia, et al. “Plasmon Decay and Nonequilibrium Steady States in Josephson Junction Chains.” <i>Physical Review B</i>, vol. 114, no. 19, 194501, American Physical Society, 2026, doi:<a href=\"https://doi.org/10.1103/cw3m-thsw\">10.1103/cw3m-thsw</a>.","apa":"Vigliotti, L., Higginbotham, A. P., &#38; Serbyn, M. (2026). Plasmon decay and nonequilibrium steady states in Josephson junction chains. <i>Physical Review B</i>. American Physical Society. <a href=\"https://doi.org/10.1103/cw3m-thsw\">https://doi.org/10.1103/cw3m-thsw</a>","ieee":"L. Vigliotti, A. P. Higginbotham, and M. Serbyn, “Plasmon decay and nonequilibrium steady states in Josephson junction chains,” <i>Physical Review B</i>, vol. 114, no. 19. American Physical Society, 2026.","ista":"Vigliotti L, Higginbotham AP, Serbyn M. 2026. Plasmon decay and nonequilibrium steady states in Josephson junction chains. Physical Review B. 114(19), 194501.","chicago":"Vigliotti, Lucia, Andrew P Higginbotham, and Maksym Serbyn. “Plasmon Decay and Nonequilibrium Steady States in Josephson Junction Chains.” <i>Physical Review B</i>. American Physical Society, 2026. <a href=\"https://doi.org/10.1103/cw3m-thsw\">https://doi.org/10.1103/cw3m-thsw</a>.","short":"L. Vigliotti, A.P. Higginbotham, M. Serbyn, Physical Review B 114 (2026).","ama":"Vigliotti L, Higginbotham AP, Serbyn M. Plasmon decay and nonequilibrium steady states in Josephson junction chains. <i>Physical Review B</i>. 2026;114(19). doi:<a href=\"https://doi.org/10.1103/cw3m-thsw\">10.1103/cw3m-thsw</a>"},"doi":"10.1103/cw3m-thsw","dataavailabilitystatement":"The data and the source code that support the findings of this paper are openly available at: https://doi.org/10.5281/zenodo.19456426.","article_number":"194501","project":[{"name":"Center for Correlated Quantum Materials and Solid State Quantum Systems:  Probing topology in circuits and quantum materials","_id":"34a7f947-11ca-11ed-8bc3-c5dc2bbaae25","grant_number":"F8609"}],"language":[{"iso":"eng"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","month":"10","scopus_import":"1","oa_version":"Published Version"},{"department":[{"_id":"MaSe"},{"_id":"AnHi"},{"_id":"GeKa"}],"has_accepted_license":"1","corr_author":"1","publication_identifier":{"eissn":["2375-2548"]},"abstract":[{"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.","lang":"eng"}],"file_date_updated":"2026-02-24T07:23:32Z","doi":"10.1126/sciadv.ady7222","citation":{"mla":"Bubis, Anton, et al. “Non-Equilibrium Plasmon Liquid in a Josephson Junction Chain.” <i>Science Advances</i>, vol. 12, no. 7, eady7222, AAAS, 2026, doi:<a href=\"https://doi.org/10.1126/sciadv.ady7222\">10.1126/sciadv.ady7222</a>.","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>. AAAS. <a href=\"https://doi.org/10.1126/sciadv.ady7222\">https://doi.org/10.1126/sciadv.ady7222</a>","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. AAAS, 2026.","ista":"Bubis A, Vigliotti L, Serbyn M, Higginbotham AP. 2026. Non-equilibrium plasmon liquid in a Josephson junction chain. Science Advances. 12(7), eady7222.","short":"A. Bubis, L. Vigliotti, M. Serbyn, A.P. Higginbotham, Science Advances 12 (2026).","chicago":"Bubis, Anton, Lucia Vigliotti, Maksym Serbyn, and Andrew P Higginbotham. “Non-Equilibrium Plasmon Liquid in a Josephson Junction Chain.” <i>Science Advances</i>. AAAS, 2026. <a href=\"https://doi.org/10.1126/sciadv.ady7222\">https://doi.org/10.1126/sciadv.ady7222</a>.","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>"},"DOAJ_listed":"1","article_processing_charge":"Yes","title":"Non-equilibrium plasmon liquid in a Josephson junction chain","external_id":{"arxiv":["2504.09721"]},"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.","ddc":["530"],"date_updated":"2026-10-20T08:10:46Z","_id":"21340","publisher":"AAAS","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","language":[{"iso":"eng"}],"month":"02","oa_version":"Published Version","article_number":"eady7222","tmp":{"image":"/images/cc_by.png","short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"publication":"Science Advances","fulldoi":"https://doi.org/10.1126/sciadv.ady7222","publication_status":"published","arxiv":1,"date_published":"2026-02-13T00:00:00Z","oa":1,"date_created":"2026-02-22T20:47:38Z","type":"journal_article","issue":"7","status":"public","PlanS_conform":"1","year":"2026","intvolume":"        12","day":"13","acknowledged_ssus":[{"_id":"NanoFab"},{"_id":"M-Shop"}],"author":[{"full_name":"Bubis, Anton","first_name":"Anton","last_name":"Bubis","id":"1f6212b5-f795-11ec-9c0c-de4780302890"},{"first_name":"Lucia","full_name":"Vigliotti, Lucia","id":"539e1e1a-e604-11ee-a1df-f02b018e5c8c","last_name":"Vigliotti"},{"id":"47809E7E-F248-11E8-B48F-1D18A9856A87","last_name":"Serbyn","orcid":"0000-0002-2399-5827","first_name":"Maksym","full_name":"Serbyn, Maksym"},{"orcid":"0000-0003-2607-2363","id":"4AD6785A-F248-11E8-B48F-1D18A9856A87","last_name":"Higginbotham","first_name":"Andrew P","full_name":"Higginbotham, Andrew P"}],"OA_place":"publisher","volume":12,"file":[{"date_updated":"2026-02-24T07:23:32Z","relation":"main_file","checksum":"8402f322f8f0e858b1d9aac57e306e31","date_created":"2026-02-24T07:23:32Z","access_level":"open_access","file_name":"2026_ScienceAdv_Bubis.pdf","file_size":2775975,"creator":"dernst","file_id":"21353","content_type":"application/pdf","success":1}],"quality_controlled":"1","OA_type":"gold","article_type":"original"}]