{
  "id": "1507.04703",
  "version": "v1",
  "published": "2015-07-16T18:59:14.000Z",
  "updated": "2015-07-16T18:59:14.000Z",
  "title": "Loop quantum cosmology, non-Gaussianity, and CMB power asymmetry",
  "authors": [
    "Ivan Agullo"
  ],
  "comment": "7 pages, 3 figure",
  "categories": [
    "gr-qc"
  ],
  "abstract": "We argue that the anomalous power asymmetry observed in the cosmic microwave background (CMB) may have originated in a cosmic bounce preceding inflation. In loop quantum cosmology (LQC) the big bang singularity is generically replaced by a bounce due to quantum gravitational effects. We compute the spectrum of inflationary non-Gaussianity and show that strong correlation between observable scales and modes with longer (super-horizon) wavelength arise as a consequence of the evolution of perturbations across the LQC bounce. These correlations are strongly scale dependent and induce a dipole-dominated modulation on large angular scales in the CMB, in agreement with observations.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-07-16T18:59:14.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "04.60.Pp",
      "98.80.Qc"
    ],
    "keywords": [
      "loop quantum cosmology",
      "cmb power asymmetry",
      "non-gaussianity",
      "cosmic microwave background",
      "cosmic bounce preceding inflation"
    ],
    "publication": {
      "doi": "10.1103/PhysRevD.92.064038"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1383122
    }
  }
}