{
  "id": "quant-ph/0010109",
  "version": "v2",
  "published": "2000-10-30T23:05:51.000Z",
  "updated": "2002-06-27T20:18:20.000Z",
  "title": "Statistical Constraints on State Preparation for a Quantum Computer",
  "authors": [
    "Subhash Kak"
  ],
  "comment": "7 pages; the final published version",
  "journal": "Pramana, vol. 57, pp. 683-688, 2001",
  "doi": "10.1007/s12043-001-0019-7",
  "categories": [
    "quant-ph"
  ],
  "abstract": "Quantum computing algorithms require that the quantum register be initially present in a superposition state. To achieve this, we consider the practical problem of creating a coherent superposition state of several qubits. Owing to considerations of quantum statistics, this requires that the entropy of the system go down. This, in turn, has two practical implications: (i) the initial state cannot be controlled; (ii) the temperature of the system must be reduced. These factors, in addition to decoherence and sensitivity to errors, must be considered in the implementation of quantum computers.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2002-06-27T20:18:20.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum computer",
      "state preparation",
      "statistical constraints",
      "coherent superposition state",
      "quantum register"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}