{
  "id": "quant-ph/0103105",
  "version": "v2",
  "published": "2001-03-18T19:18:20.000Z",
  "updated": "2002-02-08T19:56:22.000Z",
  "title": "Implications of Teleportation for Nonlocality",
  "authors": [
    "Jonathan Barrett"
  ],
  "comment": "10 pages, no figures. Title changed to accord with Phys. Rev. A version. A note and an extra reference have been added. Journal reference added",
  "journal": "Phys. Rev. A 64, 042305 (2001)",
  "doi": "10.1103/PhysRevA.64.042305",
  "categories": [
    "quant-ph"
  ],
  "abstract": "Adopting an approach similar to that of Zukowski [Phys. Rev. A 62, 032101 (2000)], we investigate connections between teleportation and nonlocality. We derive a Bell-type inequality pertaining to the teleportation scenario and show that it is violated in the case of teleportation using a perfect singlet. We also investigate teleportation using `Werner states' of the form x P + (1-x) I/4, where P is the projector corresponding to a singlet state and I is the identity. We find that our inequality is violated, implying nonlocality, if x > 1/sqrt(2). In addition, we extend Werner's local hidden variable model to simulation of teleportation with the x = 1/2 Werner state. Thus teleportation using this state does not involve nonlocality even though the fidelity achieved is 3/4 which is greater than the `classical limit' of 2/3. Finally, we comment on a result of Gisin's and offer some philosophical remarks on teleportation and nonlocality generally.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2002-02-08T19:56:22.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "nonlocality",
      "werner state",
      "werners local hidden variable model",
      "implications",
      "extend werners local hidden variable"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. A"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}