{
  "id": "quant-ph/9907068",
  "version": "v1",
  "published": "1999-07-21T23:59:42.000Z",
  "updated": "1999-07-21T23:59:42.000Z",
  "title": "Fidelity for Multimode Thermal Squeezed States",
  "authors": [
    "Gh. -S. Paraoanu",
    "H. Scutaru"
  ],
  "comment": "5 pages, RevTex, submitted to Phys. Rev. A",
  "doi": "10.1103/PhysRevA.61.022306",
  "categories": [
    "quant-ph"
  ],
  "abstract": "In the theory of quantum transmission of information the concept of fidelity plays a fundamental role. An important class of channels, which can be experimentally realized in quantum optics, is that of Gaussian quantum channels. In this work we present a general formula for fidelity in the case of two arbitrary Gaussian states. From this formula one can get a previous result (H. Scutaru, J. Phys. A: Mat. Gen {\\bf 31}, 3659 (1998)), for the case of a single mode; or, one can apply it to obtain a closed compact expression for multimode thermal states.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1999-07-21T23:59:42.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "multimode thermal squeezed states",
      "multimode thermal states",
      "arbitrary gaussian states",
      "gaussian quantum channels",
      "closed compact expression"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. A"
    },
    "note": {
      "typesetting": "RevTeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 504289
    }
  }
}