{
  "id": "1107.3886",
  "version": "v1",
  "published": "2011-07-20T03:23:04.000Z",
  "updated": "2011-07-20T03:23:04.000Z",
  "title": "On-demand single-electron transfer between distant quantum dots",
  "authors": [
    "R. P. G. McNeil",
    "M. Kataoka",
    "C. J. B. Ford",
    "C. H. W. Barnes",
    "D. Anderson",
    "G. A. C. Jones",
    "I. Farrer",
    "D. A. Ritchie"
  ],
  "comment": "4 pages, 4 figures",
  "journal": "Nature 477, 439-442 (22 September 2011)",
  "doi": "10.1038/nature10444",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Single-electron circuits of the future, consisting of a network of quantum dots, will require a mechanism to transport electrons from one functional part to another. For example, in a quantum computer[1] decoherence and circuit complexity can be reduced by separating qubit manipulation from measurement and by providing some means to transport electrons from one to the other.[2] Tunnelling between neighbouring dots has been demonstrated[3, 4] with great control, and the manipulation of electrons in single and double-dot systems is advancing rapidly.[5-8] For distances greater than a few hundred nanometres neither free propagation nor tunnelling are viable whilst maintaining confinement of single electrons. Here we show how a single electron may be captured in a surface acoustic wave minimum and transferred from one quantum dot to a second unoccupied dot along a long empty channel. The transfer direction may be reversed and the same electron moved back and forth over sixty times without error, a cumulative distance of 0.25 mm. Such on-chip transfer extends communication between quantum dots to a range that may allow the integration of discrete quantum information-processing components and devices.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-07-20T03:23:04.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "distant quantum dots",
      "on-demand single-electron transfer",
      "transport electrons",
      "surface acoustic wave minimum",
      "on-chip transfer extends communication"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Nature",
      "year": 2011,
      "month": "Sep",
      "volume": 477,
      "number": 7365,
      "pages": 439
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2011Natur.477..439M"
    }
  }
}