Quantum-Ready Microwave Detection with Scalable Graphene Bolometers in the Strong Localization Regime
Quantum-Ready Microwave Detection with Scalable Graphene Bolometers in the Strong Localization Regime
Exploiting quantum interference of charge carriers, epitaxial graphene grown on silicon carbide emerges as a game-changing platform for ultra-sensitive bolometric sensing, featuring an intrinsic resistive thermometer response unmatched by any other graphene variant. By achieving low and uniform carrier densities, we have accessed a new regime of strong charge localization that dramatically reduces thermal conductance, significantly enhancing bolometer performance. Here we present scalable graphene-based bolometers engineered for detecting GHz-range photons, a frequency domain essential for superconducting quantum processors. Our devices deliver a state-of-the-art noise equivalent power of 40 zW$/\sqrt{\rm Hz}$ at $T=40~$mK, enabled by the steep temperature dependence of thermal conductance, $G_{\rm th}\sim T^4$ for $T<100~$mK. These results establish epitaxial graphene bolometers as versatile and low-back-action detectors, unlocking new possibilities for next-generation quantum processors and pioneering investigations into the thermodynamics and thermalization pathways of strongly entangled quantum systems.
Yu-Cheng Chang、Federico Chianese、Naveen Shetty、Johanna Huhtasaari、Aditya Jayaraman、Joonas T. Peltonen、Samuel Lara-Avila、Bayan Karimi、Andrey Danilov、Jukka P. Pekola、Sergey Kubatkin
Pico group, QTF Centre of Excellence, Department of Applied Physics, Aalto University, FinlandDepartment of Microtechnology and Nanoscience, Chalmers University of Technology, Gothenburg, SwedenDepartment of Microtechnology and Nanoscience, Chalmers University of Technology, Gothenburg, SwedenDepartment of Microtechnology and Nanoscience, Chalmers University of Technology, Gothenburg, SwedenDepartment of Microtechnology and Nanoscience, Chalmers University of Technology, Gothenburg, SwedenPico group, QTF Centre of Excellence, Department of Applied Physics, Aalto University, FinlandDepartment of Microtechnology and Nanoscience, Chalmers University of Technology, Gothenburg, SwedenPico group, QTF Centre of Excellence, Department of Applied Physics, Aalto University, FinlandDepartment of Microtechnology and Nanoscience, Chalmers University of Technology, Gothenburg, SwedenPico group, QTF Centre of Excellence, Department of Applied Physics, Aalto University, FinlandDepartment of Microtechnology and Nanoscience, Chalmers University of Technology, Gothenburg, Sweden
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Yu-Cheng Chang,Federico Chianese,Naveen Shetty,Johanna Huhtasaari,Aditya Jayaraman,Joonas T. Peltonen,Samuel Lara-Avila,Bayan Karimi,Andrey Danilov,Jukka P. Pekola,Sergey Kubatkin.Quantum-Ready Microwave Detection with Scalable Graphene Bolometers in the Strong Localization Regime[EB/OL].(2025-05-30)[2025-06-14].https://arxiv.org/abs/2505.24564.点此复制
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