{
  "id": "1408.1010",
  "version": "v2",
  "published": "2014-08-05T16:02:24.000Z",
  "updated": "2014-11-26T14:22:27.000Z",
  "title": "Inverted Singlet-Triplet Qubit Coded on a Two-Electron Double Quantum Dot",
  "authors": [
    "Sebastian Mehl",
    "David P. DiVincenzo"
  ],
  "comment": "10 pages, 4 figures",
  "journal": "Phys. Rev. B 90, 195424 (2014)",
  "doi": "10.1103/PhysRevB.90.195424",
  "categories": [
    "cond-mat.mes-hall",
    "quant-ph"
  ],
  "abstract": "The $s_z=0$ spin configuration of two electrons confined at a double quantum dot (DQD) encodes the singlet-triplet qubit (STQ). We introduce the inverted STQ (ISTQ) that emerges from the setup of two quantum dots (QDs) differing significantly in size and out-of-plane magnetic fields. The strongly confined QD has a two-electron singlet ground state, but the weakly confined QD has a two-electron triplet ground state in the $s_z=0$ subspace. Spin-orbit interactions act nontrivially on the $s_z=0$ subspace and provide universal control of the ISTQ together with electrostatic manipulations of the charge configuration. GaAs and InAs DQDs can be operated as ISTQs under realistic noise conditions.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-08-05T16:02:24.000Z",
      "abstract": "The $s_z=0$ spin configuration of two electrons confined at a double quantum dot (DQD) encodes the singlet-triplet qubit (STQ). We introduce the inverted STQ (ISTQ) that emerges from the setup of two quantum dots (QDs) differing significantly in size and out-of-plane magnetic fields. The strongly confined QD has a two-electron singlet ground state, but the weakly confined QD has a two-electron triplet ground state. Spin-orbit interactions act nontrivially on the $s_z=0$ subspace and provide universal control of the ISTQ together with electrostatic manipulations of the charge configuration. GaAs and InAs DQDs can be operated as ISTQs under realistic noise conditions.",
      "journal": null,
      "doi": null
    },
    {
      "version": "v2",
      "updated": "2014-11-26T14:22:27.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "03.67.Lx",
      "03.65.Yz",
      "73.21.La",
      "85.35.Be"
    ],
    "keywords": [
      "two-electron double quantum dot",
      "inverted singlet-triplet qubit",
      "two-electron singlet ground state",
      "two-electron triplet ground state",
      "spin-orbit interactions act"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2014,
      "month": "Nov",
      "volume": 90,
      "number": 19,
      "pages": 195424
    },
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2014PhRvB..90s5424M"
    }
  }
}