{
  "id": "2211.13493",
  "version": "v1",
  "published": "2022-11-24T09:32:06.000Z",
  "updated": "2022-11-24T09:32:06.000Z",
  "title": "Electrical control of uniformity in quantum dot devices",
  "authors": [
    "Marcel Meyer",
    "Corentin Déprez",
    "Timo R. van Abswoude",
    "Dingshan Liu",
    "Chien-An Wang",
    "Saurabh Karwal",
    "Stefan Oosterhout",
    "Franscesco Borsoi",
    "Amir Sammak",
    "Nico W. Hendrickx",
    "Giordano Scappucci",
    "Menno Veldhorst"
  ],
  "categories": [
    "cond-mat.mes-hall",
    "quant-ph"
  ],
  "abstract": "Highly uniform quantum systems are essential for the practical implementation of scalable quantum processors. While quantum dot spin qubits based on semiconductor technology are a promising platform for large-scale quantum computing, their small size makes them particularly sensitive to their local environment. Here, we present a method to electrically obtain a high degree of uniformity in the intrinsic potential landscape using hysteretic shifts of the gate voltage characteristics. We demonstrate the tuning of pinch-off voltages in quantum dot devices over hundreds of millivolts that then remain stable at least for hours. Applying our method, we homogenize the pinch-off voltages of the plunger gates in a linear array for four quantum dots reducing the spread in pinch-off voltage by one order of magnitude. This work provides a new tool for the tuning of quantum dot devices and offers new perspectives for the implementation of scalable spin qubit arrays.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-11-24T09:32:06.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum dot devices",
      "electrical control",
      "pinch-off voltage",
      "uniformity",
      "quantum dot spin qubits"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}