{
  "id": "1912.11562",
  "version": "v1",
  "published": "2019-12-24T23:11:24.000Z",
  "updated": "2019-12-24T23:11:24.000Z",
  "title": "Quantum control of nonlinear thermoelectricity at the nanoscale",
  "authors": [
    "Nobuhiko Taniguchi"
  ],
  "comment": "12 pages, 12 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We theoretically study how one can control and enhance nonlinear thermoelectricity by regulating quantum coherence in nanostructures such as a quantum dot system or a single-molecule junction. In nanostructures, the typical temperature scale is much smaller than the resonance width, which largely suppresses thermoelectric effects. Yet we demonstrate one can achieve a reasonably good thermoelectric performance by regulating quantum coherence. Engaging a quantum-dot interferometer (a quantum dot embedded in the ring geometry) as a heat engine, we explore the idea of thermoelectric enhancement induced by the Fano resonance. We develop an analytical treatment of fully nonlinear responses for a dot with or without strong interaction. Based on the microscopic model with the nonequilibrium Green function technique, we show how to enhance efficiency and/or output power as well as where to locate an optimal gate voltage. We also argue how to assess nonlinear thermoelectricity by linear-response quantities.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-12-24T23:11:24.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum control",
      "regulating quantum coherence",
      "nonequilibrium green function technique",
      "assess nonlinear thermoelectricity",
      "optimal gate voltage"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}