{
  "id": "hep-th/0310075",
  "version": "v1",
  "published": "2003-10-08T13:07:04.000Z",
  "updated": "2003-10-08T13:07:04.000Z",
  "title": "Vacuum Polarization in an Anti-de Sitter Space as an Origin for a Cosmological Constant in a Brane World",
  "authors": [
    "Li-Xin Li"
  ],
  "comment": "10 pages, including 1 figure",
  "journal": "Mod.Phys.Lett.A20:733-743,2005",
  "doi": "10.1142/S0217732305016944",
  "categories": [
    "hep-th",
    "astro-ph",
    "gr-qc"
  ],
  "abstract": "In this Letter we show that the vacuum polarization of quantum fields in an anti-de Sitter space naturally gives rise to a small but nonzero cosmological constant in a brane world living in it. To explain the extremely small ratio of mass density in the cosmological constant to the Planck mass density in our universe (\\approx 10^{-123}) as suggested by cosmological observations, all we need is a four-dimensional brane world (our universe) living in a five-dimensional anti-de Sitter space with a curvature radius r_0 \\sim 10^{-3}cm and a fundamental Planck energy M_P \\sim 10^9 GeV, and a scalar field with a mass m \\sim r_0^{-1}\\sim 10^{-2}eV. Probing gravity down to a scale \\sim 10^{-3}cm, which is attainable in the near future, will provide a test of the model.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2003-10-08T13:07:04.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "04.50.+h",
      "04.62.+v",
      "98.80.-k"
    ],
    "keywords": [
      "cosmological constant",
      "vacuum polarization",
      "five-dimensional anti-de sitter space",
      "fundamental planck energy",
      "planck mass density"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 630124
    }
  }
}