{
  "id": "0910.5052",
  "version": "v3",
  "published": "2009-10-27T13:19:22.000Z",
  "updated": "2010-02-13T03:24:39.000Z",
  "title": "Backaction of a charge detector on a double quantum dot",
  "authors": [
    "Shi-Hua Ouyang",
    "Chi-Hang Lam",
    "J. Q. You"
  ],
  "comment": "6 pages, 4 figures",
  "journal": "Phys. Rev. B 81, 075301 (2010)",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We develop a master equation approach to study the backaction of quantum point contact (QPC) on a double quantum dot (DQD) at zero bias voltage. We reveal why electrons can pass through the zero-bias DQD only when the bias voltage across the QPC exceeds a threshold value determined by the eigenstate energy difference of the DQD. This derived excitation condition agrees well with experiments on QPC-induced inelastic electron tunneling through a DQD [S. Gustavsson et al., Phys. Rev. Lett. 99, 206804(2007)]. Moreover, we propose a new scheme to generate a pure spin current by the QPC in the absence of a charge current.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2010-02-13T03:24:39.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.21.La",
      "72.25.Pn",
      "73.23.Hk"
    ],
    "keywords": [
      "double quantum dot",
      "charge detector",
      "backaction",
      "quantum point contact",
      "eigenstate energy difference"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "doi": "10.1103/PhysRevB.81.075301",
      "year": 2010,
      "month": "Feb",
      "volume": 81,
      "number": 7,
      "pages": "075301"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010PhRvB..81g5301O"
    }
  }
}