{
  "id": "quant-ph/0209071",
  "version": "v3",
  "published": "2002-09-10T15:55:10.000Z",
  "updated": "2003-01-17T06:51:57.000Z",
  "title": "Scaling of Decoherence Effects in Quantum Computers",
  "authors": [
    "B. J. Dalton"
  ],
  "comment": "18 pages, 1 figure, modified intro, added refs, corrected typos, further revisions to J Mod Opt galley proofs",
  "journal": "J. Mod. Opt. 50, 951 (2003)",
  "categories": [
    "quant-ph"
  ],
  "abstract": "The scaling of decoherence rates with the number of q-bits is studied for a simple quantum computer model. Two state q-bits are localised around well-separated positions via trapping potentials, but vibrational motion of q-bits centre of mass motion occurs. Coherent one and two q-bit gating processes are controlled by external classical fields and facilitated by a high Q cavity mode. Decoherence due to q-bit and cavity mode coupling to a bath of spontaneous emission modes, cavity decay modes and to the vibrational modes is treated. A non-Markovian treatment of the short time behaviour of the fidelity is presented, enabling time scales for decoherence to be determined, together with their dependence on q-bit number for the case where the q-bit/cavity mode system is in a pure state and the baths are in thermal states.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2003-01-17T06:51:57.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "decoherence effects",
      "simple quantum computer model",
      "mass motion occurs",
      "short time behaviour",
      "cavity decay modes"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1080/09500340308234544",
      "journal": "Journal of Modern Optics",
      "year": 2003,
      "month": "Jun",
      "volume": 50,
      "number": 6,
      "pages": 951
    },
    "note": {
      "typesetting": "TeX",
      "pages": 18,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2003JMOp...50..951D"
    }
  }
}