{
  "id": "1006.0734",
  "version": "v3",
  "published": "2010-06-03T20:12:05.000Z",
  "updated": "2010-11-08T14:08:49.000Z",
  "title": "Phase estimation without a priori knowledge in the presence of loss",
  "authors": [
    "Jan Kolodynski",
    "Rafal Demkowicz-Dobrzanski"
  ],
  "comment": "8 pages, 2 figures, discussion on adaptive strategies added",
  "journal": "Phys. Rev. A 82, 053804 (2010)",
  "doi": "10.1103/PhysRevA.82.053804",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We find the optimal scheme for quantum phase estimation in the presence of loss when no a priori knowledge on the estimated phase is available. We prove analytically an explicit lower bound on estimation uncertainty, which shows that, as a function of number of probes, quantum precision enhancement amounts at most to a constant factor improvement over classical strategies",
  "revisions": [
    {
      "version": "v3",
      "updated": "2010-11-08T14:08:49.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "42.50.St",
      "03.65.Ta",
      "05.40.Ca",
      "06.20.Dk"
    ],
    "keywords": [
      "priori knowledge",
      "quantum precision enhancement amounts",
      "explicit lower bound",
      "quantum phase estimation",
      "constant factor improvement"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review A",
      "year": 2010,
      "month": "Nov",
      "volume": 82,
      "number": 5,
      "pages": "053804"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010PhRvA..82e3804K"
    }
  }
}