{
  "id": "quant-ph/0408162",
  "version": "v1",
  "published": "2004-08-26T06:48:43.000Z",
  "updated": "2004-08-26T06:48:43.000Z",
  "title": "Algorithm-Based Analysis of Collective Decoherence in Quantum Computation",
  "authors": [
    "Shoko Utsunomiya",
    "Cyrus P. Master",
    "Yoshihisa Yamamoto"
  ],
  "comment": "15 pages, 14 figures",
  "categories": [
    "quant-ph"
  ],
  "abstract": "The information in quantum computers is often stored in identical two-level systems (spins or pseudo-spins) that are separated by a distance shorter than the characteristic wavelength of a reservoir which is responsible for decoherence. In such a case, the collective spin-reservoir interaction, rather than an individual spin-reservoir interaction, may determine the decoherence characteristics. We use computational basis states, symmetrized spin states and spin coherent states to study collective decoherence in the implementation of various quantum algorithms. A simple method of implementing quantum algorithms using stable subradiant states and avoiding unstable Dicke's superradiant states and Schrodinger's cat states is proposed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2004-08-26T06:48:43.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "collective decoherence",
      "quantum computation",
      "algorithm-based analysis",
      "quantum algorithms",
      "avoiding unstable dickes superradiant states"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2004quant.ph..8162U"
    }
  }
}