{
  "id": "cond-mat/0108359",
  "version": "v2",
  "published": "2001-08-22T23:00:21.000Z",
  "updated": "2001-12-30T17:34:24.000Z",
  "title": "Quantum Phase Transition in a Multi-Level Dot",
  "authors": [
    "Walter Hofstetter",
    "Herbert Schoeller"
  ],
  "comment": "4 pages, 5 eps figures, published version",
  "journal": "Phys. Rev. Lett. 88, 016803 (2002)",
  "doi": "10.1103/PhysRevLett.88.016803",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "We discuss electronic transport through a lateral quantum dot close to the singlet-triplet degeneracy in the case of a single conduction channel per lead. By applying the Numerical Renormalization Group, we obtain rigorous results for the linear conductance and the density of states. A new quantum phase transition of the Kosterlitz-Thouless type is found, with an exponentially small energy scale $T^*$ close to the degeneracy point. Below $T^*$, the conductance is strongly suppressed, corresponding to a universal dip in the density of states. This explains recent transport measurements.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2001-12-30T17:34:24.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum phase transition",
      "multi-level dot",
      "lateral quantum dot close",
      "single conduction channel",
      "exponentially small energy scale"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}