{"date_published":"2024-02-16T00:00:00Z","quality_controlled":"1","file":[{"checksum":"0833880d47f74ad1deda93a1d8ffa5a7","file_name":"2024_PRXQuantum_Sett.pdf","access_level":"open_access","content_type":"application/pdf","file_id":"17185","success":1,"date_created":"2024-06-28T12:04:43Z","relation":"main_file","creator":"cchlebak","date_updated":"2024-06-28T12:04:43Z","file_size":1443351}],"tmp":{"short":"CC BY (4.0)","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"article_number":"010327","oa_version":"Published Version","acknowledgement":"This work has received funding from the Austrian Science Fund (FWF) through BeyondC (F7105) and the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 862644 (FETopen QUARTET). A.V. acknowledges support from the National Research, Development and Innovation Office of Hungary (NKFIH) within the Quantum Information National Laboratory of Hungary. The authors thank the MIBA workshop and the Institute of Science and Technology Austria nanofabrication facility for technical support. We are grateful to HUN-REN Cloud for providing us with suitable computational infrastructure for the simulations.","project":[{"name":"Quantum readout techniques and technologies","grant_number":"862644","_id":"237CBA6C-32DE-11EA-91FC-C7463DDC885E","call_identifier":"H2020"},{"call_identifier":"FWF","_id":"26927A52-B435-11E9-9278-68D0E5697425","name":"Integrating superconducting quantum circuits","grant_number":"F07105"}],"issue":"1","title":"Emergent macroscopic bistability induced by a single superconducting qubit","article_type":"original","ddc":["530"],"date_created":"2024-06-27T10:58:06Z","corr_author":"1","language":[{"iso":"eng"}],"author":[{"first_name":"Riya","full_name":"Sett, Riya","id":"2E6D040E-F248-11E8-B48F-1D18A9856A87","last_name":"Sett"},{"last_name":"Hassani","orcid":"0000-0001-6937-5773","full_name":"Hassani, Farid","id":"2AED110C-F248-11E8-B48F-1D18A9856A87","first_name":"Farid"},{"first_name":"Duc T","full_name":"Phan, Duc T","id":"29C8C0B4-F248-11E8-B48F-1D18A9856A87","last_name":"Phan"},{"id":"2D25E1F6-F248-11E8-B48F-1D18A9856A87","full_name":"Barzanjeh, Shabir","first_name":"Shabir","last_name":"Barzanjeh","orcid":"0000-0003-0415-1423"},{"first_name":"Andras","full_name":"Vukics, Andras","last_name":"Vukics"},{"orcid":"0000-0001-8112-028X","last_name":"Fink","first_name":"Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","full_name":"Fink, Johannes M"}],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","month":"02","type":"journal_article","publisher":"American Physical Society","scopus_import":"1","license":"https://creativecommons.org/licenses/by/4.0/","abstract":[{"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.","lang":"eng"}],"external_id":{"arxiv":["2210.14182"]},"year":"2024","ec_funded":1,"acknowledged_ssus":[{"_id":"M-Shop"}],"oa":1,"status":"public","doi":"10.1103/prxquantum.5.010327","day":"16","file_date_updated":"2024-06-28T12:04:43Z","publication":"PRX Quantum","department":[{"_id":"JoFi"},{"_id":"AnHi"}],"citation":{"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>.","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.","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.","short":"R. Sett, F. Hassani, D.T. Phan, S. Barzanjeh, A. Vukics, J.M. Fink, PRX Quantum 5 (2024).","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>.","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>"},"article_processing_charge":"Yes","publication_status":"published","_id":"17183","publication_identifier":{"issn":["2691-3399"]},"date_updated":"2024-07-15T07:03:08Z","intvolume":"         5","volume":5,"has_accepted_license":"1"}