{
  "id": "1505.06000",
  "version": "v1",
  "published": "2015-05-22T09:23:01.000Z",
  "updated": "2015-05-22T09:23:01.000Z",
  "title": "Quantum phase estimation using a class of entangled states: NOON-type states",
  "authors": [
    "Su-Yong Lee",
    "Chang-Woo Lee",
    "Jaehak Lee",
    "Hyunchul Nha"
  ],
  "comment": "4+ pages, 4 figures",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We address how a quantum phase estimation using a $|\\phi 0\\rangle+|0\\phi\\rangle$-type entangled state can be controllable by Mandel Q-factor of a single-mode state $|\\phi\\rangle$. From a simple form of the quantum Fisher information, we show that quantum Cram\\'er-Rao bound can be enhanced with super-Poissonianity of the single-mode component. For an optical phase estimation, these bounds can also be achieved in a certain range of unknown phases by performing a parity measurement at the output. On the other hand, over an entire range $[0,2\\pi]$ of unknown phase shifts, we show that the phase-shift range for beating shot-noise limit can be enlarged with sub-Poissonianity of the single-mode component.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-05-22T09:23:01.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum phase estimation",
      "entangled state",
      "noon-type states",
      "single-mode component",
      "unknown phase shifts"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2015arXiv150506000L"
    }
  }
}