{"volume":5,"external_id":{"arxiv":["2210.14182"]},"has_accepted_license":"1","article_type":"original","status":"public","abstract":[{"lang":"eng","text":"The photon blockade breakdown in a continuously driven cavity QED system has been proposed as a prime example for a first-order driven-dissipative quantum phase transition. However, the predicted scaling from a microscopic behavior—dominated by quantum fluctuations—to a macroscopic one—characterized by stable phases—and the associated exponents and phase diagram have not been observed so far. In this work we couple a single transmon qubit with a fixed coupling strength 𝑔 to a superconducting cavity that is in situ bandwidth 𝜅 tunable to controllably approach this thermodynamic limit. Even though the system remains microscopic, we observe its behavior becoming increasingly macroscopic as a function of 𝑔/𝜅. For the highest realized 𝑔/𝜅 of approximately 287, the system switches with a characteristic timescale as long as 6 s between a bright coherent state with approximately 8×103 intracavity photons and the vacuum state. This exceeds the microscopic timescales by 6 orders of magnitude and approaches the perfect hysteresis expected between two macroscopic attractors in the thermodynamic limit. These findings and interpretation are qualitatively supported by neoclassical theory and large-scale quantum-jump Monte Carlo simulations. Besides shedding more light on driven-dissipative physics in the limit of strong light-matter coupling, this system might also find applications in quantum sensing and metrology."}],"intvolume":"         5","date_updated":"2024-06-28T12:10:03Z","tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png"},"quality_controlled":"1","day":"16","corr_author":"1","publisher":"American Physical Society","oa":1,"scopus_import":"1","publication_status":"published","title":"Emergent macroscopic bistability induced by a single superconducting qubit","issue":"1","month":"02","_id":"17183","doi":"10.1103/prxquantum.5.010327","publication_identifier":{"issn":["2691-3399"]},"citation":{"short":"R. Sett, F. Hassani, D.T. Phan, S. Barzanjeh, A. Vukics, J.M. Fink, PRX Quantum 5 (2024).","apa":"Sett, R., Hassani, F., Phan, D. T., Barzanjeh, S., Vukics, A., &#38; Fink, J. M. (2024). Emergent macroscopic bistability induced by a single superconducting qubit. <i>PRX Quantum</i>. American Physical Society. <a href=\"https://doi.org/10.1103/prxquantum.5.010327\">https://doi.org/10.1103/prxquantum.5.010327</a>","ista":"Sett R, Hassani F, Phan DT, Barzanjeh S, Vukics A, Fink JM. 2024. Emergent macroscopic bistability induced by a single superconducting qubit. PRX Quantum. 5(1), 010327.","ama":"Sett R, Hassani F, Phan DT, Barzanjeh S, Vukics A, Fink JM. Emergent macroscopic bistability induced by a single superconducting qubit. <i>PRX Quantum</i>. 2024;5(1). doi:<a href=\"https://doi.org/10.1103/prxquantum.5.010327\">10.1103/prxquantum.5.010327</a>","mla":"Sett, Riya, et al. “Emergent Macroscopic Bistability Induced by a Single Superconducting Qubit.” <i>PRX Quantum</i>, vol. 5, no. 1, 010327, American Physical Society, 2024, doi:<a href=\"https://doi.org/10.1103/prxquantum.5.010327\">10.1103/prxquantum.5.010327</a>.","chicago":"Sett, Riya, Farid Hassani, Duc T Phan, Shabir Barzanjeh, Andras Vukics, and Johannes M Fink. “Emergent Macroscopic Bistability Induced by a Single Superconducting Qubit.” <i>PRX Quantum</i>. American Physical Society, 2024. <a href=\"https://doi.org/10.1103/prxquantum.5.010327\">https://doi.org/10.1103/prxquantum.5.010327</a>.","ieee":"R. Sett, F. Hassani, D. T. Phan, S. Barzanjeh, A. Vukics, and J. M. Fink, “Emergent macroscopic bistability induced by a single superconducting qubit,” <i>PRX Quantum</i>, vol. 5, no. 1. American Physical Society, 2024."},"type":"journal_article","oa_version":"Published Version","date_created":"2024-06-27T10:58:06Z","publication":"PRX Quantum","article_number":"010327","article_processing_charge":"No","date_published":"2024-02-16T00:00:00Z","file":[{"date_updated":"2024-06-28T12:04:43Z","content_type":"application/pdf","file_name":"2024_PRXQuantum_Sett.pdf","date_created":"2024-06-28T12:04:43Z","file_size":1443351,"relation":"main_file","success":1,"access_level":"open_access","file_id":"17185","checksum":"0833880d47f74ad1deda93a1d8ffa5a7","creator":"cchlebak"}],"ddc":["530"],"year":"2024","author":[{"full_name":"Sett, Riya","first_name":"Riya","id":"2E6D040E-F248-11E8-B48F-1D18A9856A87","last_name":"Sett"},{"last_name":"Hassani","id":"2AED110C-F248-11E8-B48F-1D18A9856A87","full_name":"Hassani, Farid","orcid":"0000-0001-6937-5773","first_name":"Farid"},{"first_name":"Duc T","full_name":"Phan, Duc T","last_name":"Phan","id":"29C8C0B4-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Barzanjeh, Shabir","orcid":"0000-0003-0415-1423","first_name":"Shabir","last_name":"Barzanjeh","id":"2D25E1F6-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Vukics, Andras","first_name":"Andras","last_name":"Vukics"},{"orcid":"0000-0001-8112-028X","first_name":"Johannes M","full_name":"Fink, Johannes M","last_name":"Fink","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87"}],"file_date_updated":"2024-06-28T12:04:43Z","language":[{"iso":"eng"}],"department":[{"_id":"JoFi"},{"_id":"AnHi"}],"user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9"}