{
  "id": "1306.4474",
  "version": "v2",
  "published": "2013-06-19T10:04:24.000Z",
  "updated": "2015-06-26T10:02:51.000Z",
  "title": "Discriminating quantum field theories in non-inertial frames",
  "authors": [
    "Jason Doukas",
    "Gerardo Adesso",
    "Stefano Pirandola",
    "Andrzej Dragan"
  ],
  "comment": "15 pages, 3 figures. Close to published version",
  "journal": "Class. Quantum Grav. 32, 035013 (2015)",
  "doi": "10.1088/0264-9381/32/3/035013",
  "categories": [
    "quant-ph",
    "gr-qc"
  ],
  "abstract": "Quantum channel discrimination is used to test quantum field theory in non-inertial frames. We search for optimal strategies which can best see the thermality of the Unruh effect. We find that the usual strategy of counting particles in the vacuum can be improved, thereby enhancing the discrimination. Coherent state probes, which are practical and feasible, give exponential improvement in the discrimination of the Unruh channel and come very close to optimal. In particular, we show that using a short pulse laser, the accelerations required to test the Unruh effect can be reduced by at least three orders of magnitude with the same statistical confidence as could be achieved in vacuum. These results are expected to be relevant to upcoming experimental tests of quantum field theory in curved spacetimes in analogue systems.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2013-06-19T10:04:24.000Z",
      "title": "Discriminating quantum field theories in curved spacetime",
      "abstract": "We initiate a program of using quantum channel discrimination to test physical theories. In particular, we focus on quantum field theories in curved spacetimes. We use the example of the Unruh effect to illustrate the principle of this approach, discriminating it against an existing alternative theory that does not predict thermal particles. We find that the usual strategy of counting particles in the vacuum can be improved on, thereby enhancing the discrimination. Coherent state probes, which are practical and feasible, give exponential improvement in the discrimination of the Unruh channel and come very close to optimal. These results are expected to be relevant to upcoming experimental tests of quantum field theory in curved spacetimes in analogue systems.",
      "comment": "5 pages, 3 figures",
      "journal": null,
      "doi": null
    },
    {
      "version": "v2",
      "updated": "2015-06-26T10:02:51.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum field theory",
      "discriminating quantum field theories",
      "curved spacetime",
      "predict thermal particles",
      "quantum channel discrimination"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/0264-9381/32/3/035013",
      "publisher": "IOP",
      "journal": "Classical and Quantum Gravity",
      "year": 2015,
      "month": "Feb",
      "volume": 32,
      "number": 3,
      "pages": "035013"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1239145,
      "adsabs": "2015CQGra..32c5013D"
    }
  }
}