{
  "id": "quant-ph/0204097",
  "version": "v2",
  "published": "2002-04-17T20:32:44.000Z",
  "updated": "2002-05-03T17:26:17.000Z",
  "title": "Quantum relays and noise suppression using linear optics",
  "authors": [
    "B. C. Jacobs",
    "T. B. Pittman",
    "J. D. Franson"
  ],
  "comment": "minor changes; references added",
  "doi": "10.1103/PhysRevA.66.052307",
  "categories": [
    "quant-ph"
  ],
  "abstract": "Probabilistic quantum non-demolition (QND) measurements can be performed using linear optics and post-selection. Here we show how QND devices of this kind can be used in a straightforward way to implement a quantum relay, which is capable of extending the range of a quantum cryptography system by suppressing the effects of detector noise. Unlike a quantum repeater, a quantum relay system does not require entanglement purification or the ability to store photons.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2002-05-03T17:26:17.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "linear optics",
      "noise suppression",
      "probabilistic quantum non-demolition",
      "quantum cryptography system",
      "quantum relay system"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. A"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}