{
  "id": "0704.0523",
  "version": "v2",
  "published": "2007-04-04T08:44:23.000Z",
  "updated": "2007-07-23T13:56:50.000Z",
  "title": "Quantum superpositions and entanglement of thermal states at high temperatures and their applications to quantum information processing",
  "authors": [
    "Hyunseok Jeong",
    "Timothy C. Ralph"
  ],
  "comment": "12 pages, 11 figures, minor corrections, to be published in Phys. Rev. A",
  "journal": "Phys. Rev. A 76, 042103 (2007)",
  "doi": "10.1103/PhysRevA.76.042103",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We study characteristics of superpositions and entanglement of thermal states at high temperatures and discuss their applications to quantum information processing. We introduce thermal-state qubits and thermal-Bell states, which are a generalization of pure-state qubits and Bell states to thermal mixtures. A scheme is then presented to discriminate between the four thermal-Bell states without photon number resolving detection but with Kerr nonlinear interactions and two single-photon detectors. This enables one to perform quantum teleportation and gate operations for quantum computation with thermal-state qubits.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2007-07-23T13:56:50.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "03.65.Ta",
      "03.67.-a",
      "03.65.Ud",
      "42.50.-p"
    ],
    "keywords": [
      "quantum information processing",
      "thermal states",
      "high temperatures",
      "quantum superpositions",
      "entanglement"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review A",
      "year": 2007,
      "month": "Oct",
      "volume": 76,
      "number": 4,
      "pages": "042103"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2007PhRvA..76d2103J"
    }
  }
}