{
  "id": "1004.4081",
  "version": "v1",
  "published": "2010-04-23T09:38:06.000Z",
  "updated": "2010-04-23T09:38:06.000Z",
  "title": "Performance of the coupled cluster singles and doubles method on two-dimensional quantum dots",
  "authors": [
    "Erik Waltersson",
    "Eva Lindroth"
  ],
  "comment": "11 pages, 1 figure, 5 tables",
  "doi": "10.1103/PhysRevB.87.035112",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "An implementation of the coupled-cluster single- and double excitations (CCSD) method on two-dimensional quantum dots is presented. Advantages and limitations are studied through comparison with other high accuracy approaches for two to eight confined electrons. The possibility to effectively use a very large basis set is found to be an important advantage compared to full configuration interaction implementations. For the two to eight electron ground states, with a confinement strength close to what is used in experiments, the error in the energy introduced by truncating triple excitations and beyond is shown to be on the same level or less than the differences in energy given by two different Quantum Monte Carlo methods. Convergence of the iterative solution of the coupled cluster equations is, for some cases, found for surprisingly weak confinement strengths even when starting from a non-interacting basis. The limit where the missing triple and higher excitations become relevant is investigated through comparison with full Configuration Interaction results.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-04-23T09:38:06.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.21.La",
      "71.15.-m",
      "31.15.bw"
    ],
    "keywords": [
      "two-dimensional quantum dots",
      "coupled cluster singles",
      "doubles method",
      "full configuration interaction results",
      "quantum monte carlo methods"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2013,
      "month": "Jan",
      "volume": 87,
      "number": 3,
      "pages": "035112"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013PhRvB..87c5112W"
    }
  }
}