{
  "id": "cond-mat/0402603",
  "version": "v1",
  "published": "2004-02-24T19:29:27.000Z",
  "updated": "2004-02-24T19:29:27.000Z",
  "title": "Entangled electronic state via an interacting quantum dot",
  "authors": [
    "Gladys León",
    "Otto Rendon",
    "Horacio M. Pastawski",
    "Vladimiro Mujica",
    "Ernesto Medina"
  ],
  "comment": "5 pages, 5 figures",
  "doi": "10.1209/epl/i2003-10257-1",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We study a device for entangling electrons as cotunneling occurs through a quantum dot where on-site electron-electron interactions $U$ are in place. The main advantage of this device is that single particle processes are forbidden by energy conservation as proposed by Oliver et al\\cite{oli02}. Within this model we calculated two electron transition amplitude, in terms of the T-matrix, to all orders in the coupling to the dot, and consider a finite lead bandwidth. The model filters singlet entangled pairs with the sole requirement of Pauli principle. Feynman paths involving consecutive and doubly occupied dot interfere destructively and produce a transition amplitude minimum at a critical value of the onsite repulsion $U$. Singlet filtering is demonstrated as a function of a gate voltage applied to the dot with a special resonance condition when the dot levels are symmetrically placed about the input lead energy.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2004-02-24T19:29:27.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "interacting quantum dot",
      "entangled electronic state",
      "occupied dot interfere",
      "model filters singlet entangled pairs",
      "electron transition amplitude"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}