{
  "id": "cond-mat/0407121",
  "version": "v1",
  "published": "2004-07-06T10:43:19.000Z",
  "updated": "2004-07-06T10:43:19.000Z",
  "title": "Real-time detection of single electron tunneling using a quantum point contact",
  "authors": [
    "L. M. K. Vandersypen",
    "J. M. Elzerman",
    "R. N. Schouten",
    "L. H. Willems van Beveren",
    "R. Hanson",
    "L. P. Kouwenhoven"
  ],
  "comment": "3 pages, 3 figures, submitted",
  "doi": "10.1063/1.1815041",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We observe individual tunnel events of a single electron between a quantum dot and a reservoir, using a nearby quantum point contact (QPC) as a charge meter. The QPC is capacitively coupled to the dot, and the QPC conductance changes by about 1% if the number of electrons on the dot changes by one. The QPC is voltage biased and the current is monitored with an IV-convertor at room temperature. We can resolve tunnel events separated by only 8 $\\mu$s, limited by noise from the IV-convertor. Shot noise in the QPC sets a 25 ns lower bound on the accessible timescales.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2004-07-06T10:43:19.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "single electron tunneling",
      "real-time detection",
      "nearby quantum point contact",
      "ns lower bound",
      "individual tunnel events"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 3,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}