{
  "id": "quant-ph/0204020",
  "version": "v1",
  "published": "2002-04-04T17:23:37.000Z",
  "updated": "2002-04-04T17:23:37.000Z",
  "title": "What is entanglement?",
  "authors": [
    "Emilio Santos"
  ],
  "comment": "17 pages, no figures",
  "categories": [
    "quant-ph"
  ],
  "abstract": "I conjecture that only those states of light whose Wigner function is positive are real states, and give arguments suggesting that this is not a serious restriction. Hence it follows that the Wigner formalism in quantum optics is capable of interpretation as a classical wave field with the addition of a zeropoint contribution. Thus entanglement between pairs of photons with a common origin occurs because the two light signals have amplitudes and phases, both below and above the zeropoint intensity level, which are correlated with each other.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2002-04-04T17:23:37.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "entanglement",
      "common origin occurs",
      "zeropoint intensity level",
      "wigner function",
      "real states"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 17,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2002quant.ph..4020S"
    }
  }
}