{
  "id": "0907.4909",
  "version": "v1",
  "published": "2009-07-28T13:06:31.000Z",
  "updated": "2009-07-28T13:06:31.000Z",
  "title": "Geometric Phase in Entangled Systems: A Single-Neutron Interferometer Experiment",
  "authors": [
    "S. Sponar",
    "J. Klepp",
    "R. Loidl",
    "S. Filipp",
    "K. Durstberger-Rennhofer",
    "R. A. Bertlmann",
    "G. Badurek",
    "Y. Hasegawa",
    "H. Rauch"
  ],
  "comment": "10 pages 9 figures",
  "journal": "Phys. Rev. A 81, 042113 (2010)",
  "categories": [
    "quant-ph"
  ],
  "abstract": "The influence of the geometric phase on a Bell measurement, as proposed by Bertlmann et al. in [Phys. Rev. A 69, 032112 (2004)], and expressed by the Clauser-Horne-Shimony-Holt (CHSH) inequality, has been observed for a spin-path entangled neutron state in an interferometric setup. It is experimentally demonstrated that the effect of geometric phase can be balanced by a change in Bell angles. The geometric phase is acquired during a time dependent interaction with two radio-frequency (rf) fields. Two schemes, polar and azimuthal adjustment of the Bell angles, are realized and analyzed in detail. The former scheme, yields a sinusoidal oscillation of the correlation function S, dependent on the geometric phase, such that it varies in the range between 2 and 2\\sqrt{2} and, therefore, always exceeds the boundary value 2 between quantum mechanic and noncontextual theories. The latter scheme results in a constant, maximal violation of the Bell-like-CHSH inequality, where S remains 2\\sqrt2 for all settings of the geometric phase.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-07-28T13:06:31.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "03.65.Vf",
      "03.75.Dg",
      "03.65.Ud",
      "07.60.Ly"
    ],
    "keywords": [
      "geometric phase",
      "single-neutron interferometer experiment",
      "entangled systems",
      "bell angles",
      "spin-path entangled neutron state"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review A",
      "doi": "10.1103/PhysRevA.81.042113",
      "year": 2010,
      "month": "Apr",
      "volume": 81,
      "number": 4,
      "pages": "042113"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010PhRvA..81d2113S"
    }
  }
}