{
  "id": "quant-ph/9902076",
  "version": "v1",
  "published": "1999-02-24T12:00:37.000Z",
  "updated": "1999-02-24T12:00:37.000Z",
  "title": "Spontaneous emission and level shifts in absorbing disordered dielectrics and dense atomic gases: A Green's function approach",
  "authors": [
    "Michael Fleischhauer"
  ],
  "comment": "6 pages no figures",
  "doi": "10.1103/PhysRevA.60.2534",
  "categories": [
    "quant-ph"
  ],
  "abstract": "Spontaneous emission and Lamb shift of atoms in absorbing dielectrics are discussed. A Green's-function approach is used based on the multipolar interaction Hamiltonian of a collection of atomic dipoles with the quantised radiation field. The rate of decay and level shifts are determined by the retarded Green's-function of the interacting electric displacement field, which is calculated from a Dyson equation describing multiple scattering. The positions of the atomic dipoles forming the dielectrics are assumed to be uncorrelated and a continuum approximation is used. The associated unphysical interactions between different atoms at the same location is eliminated by removing the point-interaction term from the free-space Green's-function (local field correction). For the case of an atom in a purely dispersive medium the spontaneous emission rate is altered by the well-known Lorentz local-field factor. In the presence of absorption a result different from previously suggested expressions is found and nearest-neighbour interactions are shown to be important.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1999-02-24T12:00:37.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "greens function approach",
      "dense atomic gases",
      "spontaneous emission",
      "level shifts",
      "absorbing disordered dielectrics"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. A"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 495849
    }
  }
}