{
  "id": "1004.2508",
  "version": "v1",
  "published": "2010-04-14T21:01:18.000Z",
  "updated": "2010-04-14T21:01:18.000Z",
  "title": "Perturbation theory for confined systems",
  "authors": [
    "Francisco M. Fernández"
  ],
  "categories": [
    "quant-ph"
  ],
  "abstract": "We discuss the application of perturbation theory to a system of particles confined in a spherical box. A simple argument shows that the particles behave almost independently in sufficiently strong confinement. We choose the helium atom with a moving nucleus as a particular example and compare results of first order with those for the nucleus clamped at the center of the box. We provide a suitable explanation for some numerical results obtained recently by other authors.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-04-14T21:01:18.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "perturbation theory",
      "confined systems",
      "simple argument",
      "first order",
      "sufficiently strong confinement"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010arXiv1004.2508F"
    }
  }
}