{
  "id": "0912.2065",
  "version": "v1",
  "published": "2009-12-10T19:36:58.000Z",
  "updated": "2009-12-10T19:36:58.000Z",
  "title": "Implementation of a non-deterministic optical noiseless amplifier",
  "authors": [
    "Franck Ferreyrol",
    "Marco Barbieri",
    "Remi Blandino",
    "Simon Fossier",
    "Rosa Tualle-Brouri",
    "Philippe Grangier"
  ],
  "categories": [
    "quant-ph"
  ],
  "abstract": "Quantum mechanics imposes that any amplifier that works independently on the phase of the input signal has to introduce some excess noise. The impossibility of such a noiseless amplifier is rooted into unitarity and linearity of quantum evolution. A possible way to circumvent this limitation is to interrupt such evolution via a measurement, providing a random outcome able to herald a successful - and noiseless - amplification event. Here we show a successful realisation of such an approach; we perform a full characterization of an amplified coherent state using quantum homodyne tomography, and observe a strong heralded amplification, with about 6dB gain and a noise level significantly smaller than the minimal allowed for any ordinary phase-independent device.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-12-10T19:36:58.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "42.50.Dv",
      "03.67.Hk",
      "42.50.Ex",
      "42.50.Xa"
    ],
    "keywords": [
      "non-deterministic optical noiseless amplifier",
      "implementation",
      "quantum mechanics imposes",
      "ordinary phase-independent device",
      "noise level significantly smaller"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevLett.104.123603",
      "journal": "Physical Review Letters",
      "year": 2010,
      "month": "Mar",
      "volume": 104,
      "number": 12,
      "pages": 123603
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010PhRvL.104l3603F"
    }
  }
}