{
  "id": "quant-ph/0201033",
  "version": "v1",
  "published": "2002-01-09T09:50:59.000Z",
  "updated": "2002-01-09T09:50:59.000Z",
  "title": "Quantum Computation by Quantum Operations on Mixed States",
  "authors": [
    "Vasily E. Tarasov"
  ],
  "comment": "11 pages, LaTeX",
  "categories": [
    "quant-ph"
  ],
  "abstract": "Usually models for quantum computations deal with unitary gates on pure states. In this paper we generalize the usual model. We consider a model of quantum computations in which the state is an operator of density matrix and the gates are quantum operations, not necessarily unitary. A mixed state (operator of density matrix) of n two-level quantum systems is considered as an element of $4^{n}$-dimensional operator Hilbert space. Unitary quantum gates and nonunitary quantum operations for n-qubit system are considered as generalized quantum gates acting on mixed state. In this paper we study universality for quantum computations by quantum operations on mixed states.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2002-01-09T09:50:59.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "mixed state",
      "dimensional operator hilbert space",
      "density matrix",
      "nonunitary quantum operations",
      "quantum computations deal"
    ],
    "note": {
      "typesetting": "LaTeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2002quant.ph..1033T"
    }
  }
}