{
  "id": "0906.0962",
  "version": "v3",
  "published": "2009-06-04T19:00:47.000Z",
  "updated": "2009-08-18T11:59:29.000Z",
  "title": "Quantum-limited metrology and Bose-Einstein condensates",
  "authors": [
    "Sergio Boixo",
    "Animesh Datta",
    "Matthew J. Davis",
    "Anil Shaji",
    "Alexandre B. Tacla",
    "Carlton M. Caves"
  ],
  "comment": "32 pages, 1 figure, updated references",
  "journal": "Phys. Rev. A 80, 032103 (2009)",
  "doi": "10.1103/PhysRevA.80.032103",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We discuss a quantum-metrology protocol designed to estimate a physical parameter in a Bose-Einstein condensate of N atoms, and we show that the measurement uncertainty can decrease faster than 1/N. The 1/N scaling is usually thought to be the best possible in any measurement scheme. From the perspective of quantum information theory, we outline the main idea that leads to a measurement uncertainty that scales better than 1/N. We examine in detail some potential problems and challenges that arise in implementing such a measurement protocol using a Bose-Einstein condensate. We discuss how some of these issues can be dealt with by using lower-dimensional condensates trapped in nonharmonic potentials.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2009-08-18T11:59:29.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "03.65.Ta",
      "03.75.Nt",
      "03.75.Mn"
    ],
    "keywords": [
      "bose-einstein condensate",
      "quantum-limited metrology",
      "measurement uncertainty",
      "quantum information theory",
      "scales better"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review A",
      "year": 2009,
      "month": "Sep",
      "volume": 80,
      "number": 3,
      "pages": "032103"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 32,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009PhRvA..80c2103B"
    }
  }
}