{
  "id": "0805.2180",
  "version": "v1",
  "published": "2008-05-14T22:15:24.000Z",
  "updated": "2008-05-14T22:15:24.000Z",
  "title": "Quantum Metrology: Dynamics vs. Entanglement",
  "authors": [
    "Sergio Boixo",
    "Animesh Datta",
    "Matthew J. Davis",
    "Steven T. Flammia",
    "Anil Shaji",
    "Carlton M. Caves"
  ],
  "comment": "4 pages, 1 figure",
  "journal": "Phys. Rev. Lett. 101, 040403 (2008).",
  "doi": "10.1103/PhysRevLett.101.040403",
  "categories": [
    "quant-ph"
  ],
  "abstract": "A parameter whose coupling to a quantum probe of $n$ constituents includes all two-body interactions between the constituents can be measured with an uncertainty that scales as $1/n^{3/2}$, even when the constituents are initially unentangled. We devise a protocol that achieves the $1/n^{3/2}$ scaling without generating any entanglement among the constituents, and we suggest that the protocol might be implemented in a two-component Bose-Einstein condensate.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2008-05-14T22:15:24.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "03.65.Ta",
      "03.75.Mn",
      "03.75.Nt"
    ],
    "keywords": [
      "quantum metrology",
      "entanglement",
      "constituents",
      "two-component bose-einstein condensate",
      "quantum probe"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2008,
      "month": "Jul",
      "volume": 101,
      "number": 4,
      "pages": "040403"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008PhRvL.101d0403B"
    }
  }
}