{
  "id": "quant-ph/0107072",
  "version": "v5",
  "published": "2001-07-13T20:47:12.000Z",
  "updated": "2002-02-08T16:46:03.000Z",
  "title": "Sufficient conditions for three-particle entanglement and their tests in recent experiments",
  "authors": [
    "Michael Seevinck",
    "Jos Uffink"
  ],
  "comment": "16 pages",
  "journal": "Phys. Rev. A, volume 65, 012107 (2002)",
  "doi": "10.1103/PhysRevA.65.012107",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We point out a loophole problem in some recent experimental claims to produce three-particle entanglement. The problem consists in the question whether mixtures of two-particle entangled states might suffice to explain the experimental data. In an attempt to close this loophole, we review two sufficient conditions that distinguish between N-particle states in which all N particles are entangled to each other and states in which only M particles are entangled (with M<N). It is shown that three recent experiments to obtain three-particle entangled states (Bouwmeester et al., Pan et al., and Rauschenbeutel et al.) do not meet these conditions. We conclude that the question whether these experiments provide confirmation of three-particle entanglement remains unresolved. We also propose modifications of the experiments that would make such confirmation feasible.",
  "revisions": [
    {
      "version": "v5",
      "updated": "2002-02-08T16:46:03.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "sufficient conditions",
      "experiments",
      "three-particle entanglement remains",
      "produce three-particle entanglement",
      "problem consists"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. A"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}