{
  "id": "2310.08145",
  "version": "v1",
  "published": "2023-10-12T09:00:45.000Z",
  "updated": "2023-10-12T09:00:45.000Z",
  "title": "Coupling of hole double quantum dot in planar germanium to a microwave cavity",
  "authors": [
    "Yuan Kang",
    "Zong-Hu Li",
    "Zhen-Zhen Kong",
    "Fang-Ge Li",
    "Tian-Yue Hao",
    "Ze-Cheng Wei",
    "Song-Yan Deng",
    "Bao-Chuan Wang",
    "Hai-Ou Li",
    "Gui-Lei Wang",
    "Guang-Can Guo",
    "Gang Cao",
    "Guo-Ping Guo"
  ],
  "comment": "11 pages, 4 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "In recent years, notable progress has been made in the study of hole qubits in planar germanium, and circuit quantum electrodynamics (circuit QED) has emerged as a promising approach for achieving long-range coupling and scaling up of qubits. Here, we demonstrate the coupling between holes in a planar germanium double quantum dot (DQD) and photons in a microwave cavity. Specifically, a real-time calibrated virtual gate method is developed to characterize this hybrid system, which in turn allows us to determine the typical parameters sequentially through single-parameter fitting instead of conventional multi-parameter fitting with additional uncertainty, and gives the hole-photon coupling rate of $g_0/2\\pi$ = 21.7 MHz. This work is a step toward further research on hole-photon interactions and long-range qubit coupling in planar germanium. The experimental method developed in this work contributes to the more accurate and efficient characterization of hybrid cavity-QED systems.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-10-12T09:00:45.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "hole double quantum dot",
      "microwave cavity",
      "planar germanium double quantum dot",
      "real-time calibrated virtual gate method"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}