{
  "id": "1209.0557",
  "version": "v2",
  "published": "2012-09-04T08:03:01.000Z",
  "updated": "2012-10-04T06:57:19.000Z",
  "title": "Quantum Error Correction with Uniformly Mixed State Ancillae",
  "authors": [
    "Yasushi Kondo",
    "Chiara Bagnasco",
    "Mikio Nakahara"
  ],
  "comment": "5 pages, 5 figures",
  "doi": "10.1103/PhysRevA.88.022314",
  "categories": [
    "quant-ph"
  ],
  "abstract": "It is often assumed that the ancilla qubits required for encoding a qubit in quantum error correction (QEC) have to be in pure states, $|00...0>$ for example. In this letter, we seek an encoding scheme, in which the ancillae may be in a uniformly mixed state. We demonstrate our scheme experimentally by making use of a three-qubit NMR quantum computer. Moreover, the encoded state has an interesting nature in terms of Quantum Discord, or purely quantum correlations between the data-qubit and ancillae.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2012-10-04T06:57:19.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum error correction",
      "uniformly mixed state ancillae",
      "three-qubit nmr quantum computer",
      "ancilla qubits",
      "pure states"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. A"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012arXiv1209.0557K"
    }
  }
}