{
  "id": "quant-ph/0204017",
  "version": "v1",
  "published": "2002-04-04T01:06:03.000Z",
  "updated": "2002-04-04T01:06:03.000Z",
  "title": "Surpassing the standard quantum limit for optical imaging using non-classical multimode light",
  "authors": [
    "N. Treps",
    "U. Andersen",
    "B. Buchler",
    "P. K. Lam",
    "A. Maitre",
    "H. -A. Bachor",
    "C. Fabre"
  ],
  "comment": "4 pages, 5 figures",
  "journal": "Phys. Rev. Lett. 88, 203601 (2002)",
  "doi": "10.1103/PhysRevLett.88.203601",
  "categories": [
    "quant-ph"
  ],
  "abstract": "Using continuous wave superposition of spatial modes, we demonstrate experimentally displacement measurement of a light beam below the standard quantum limit. Multimode squeezed light is obtained by mixing a vacuum squeezed beam and a coherent beam that are spatially orthogonal. Although the resultant beam is not squeezed, it is shown to have strong internal spatial correlations. We show that the position of such a light beam can be measured using a split detector with an increased precision compared to a classical beam. This method can be used to improve the sensitivity of small displacement measurements.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2002-04-04T01:06:03.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "standard quantum limit",
      "non-classical multimode light",
      "optical imaging",
      "strong internal spatial correlations",
      "light beam"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}