{
  "id": "quant-ph/0010085",
  "version": "v1",
  "published": "2000-10-25T12:55:50.000Z",
  "updated": "2000-10-25T12:55:50.000Z",
  "title": "Entangled quantum states as direction indicators",
  "authors": [
    "Asher Peres",
    "Petra F. Scudo"
  ],
  "comment": "3 pages REVTEX and one PostScript figure",
  "journal": "Phys. Rev. Lett. 86 (2001) 4160",
  "doi": "10.1103/PhysRevLett.86.4160",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We consider the use of N spin-1/2 particles for indicating a direction in space. If N>2, their optimal state is entangled. For large N, the mean square error decreases as N^{-2} (rather than N^{-1} for parallel spins).",
  "revisions": [
    {
      "version": "v1",
      "updated": "2000-10-25T12:55:50.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "entangled quantum states",
      "direction indicators",
      "mean square error decreases",
      "optimal state",
      "parallel spins"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "RevTeX",
      "pages": 3,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}