@article{4436574a-7dff-4f38-b342-d45adfb7976d,
  abstract     = {{<p>High-efficiency single-photon detection in the microwave domain is a key enabling technology for various quantum applications. However, the extremely low energy of microwave photons presents a fundamental challenge, preventing direct photon-to-charge conversion as achieved in optical systems using semiconductors. Here, we demonstrate continuous microwave photon detection with an efficiency approaching 70% in the single-photon regime. We use a hybrid system comprising a gate-defined double quantum dot (DQD) charge qubit in a gallium arsenide/aluminum gallium arsenide heterostructure, coupled to a high-impedance Josephson junction array cavity. We systematically optimize the hybrid architecture to maximize the detection efficiency by leveraging strong charge-photon coupling, tunable DQD tunnel rates, and the frequency tunability of both subsystems. The system efficiency is characterized over a frequency range of 3 to 5.2 gigahertz. Our results establish semiconductor-based cavity-quantum electrodynamics architectures as a scalable and versatile platform for efficient microwave photon detection, opening promising avenues for quantum microwave optics and quantum information technologies.</p>}},
  author       = {{Oppliger, Fabian and Jang, Wonjin and Tarascio, Aldo and De Palma, Franco and Reichl, Christian and Wegscheider, Werner and Maisi, Ville F. and Zumbühl, Dominik and Scarlino, Pasquale}},
  issn         = {{2375-2548}},
  language     = {{eng}},
  number       = {{14}},
  publisher    = {{American Association for the Advancement of Science (AAAS)}},
  series       = {{Science Advances}},
  title        = {{Tunable high-efficiency microwave photon detector based on a double quantum dot coupled to a superconducting high-impedance cavity}},
  url          = {{http://dx.doi.org/10.1126/sciadv.aeb9784}},
  doi          = {{10.1126/sciadv.aeb9784}},
  volume       = {{12}},
  year         = {{2026}},
}