{
  "id": "quant-ph/0309146",
  "version": "v1",
  "published": "2003-09-19T10:51:22.000Z",
  "updated": "2003-09-19T10:51:22.000Z",
  "title": "Entanglement Echoes in Quantum Computation",
  "authors": [
    "Davide Rossini",
    "Giuliano Benenti",
    "Giulio Casati"
  ],
  "comment": "4 pages, 4 figures",
  "journal": "Phys. Rev. A 69, 052317 (2004)",
  "doi": "10.1103/PhysRevA.69.052317",
  "categories": [
    "quant-ph",
    "cond-mat",
    "nlin.CD"
  ],
  "abstract": "We study the stability of entanglement in a quantum computer implementing an efficient quantum algorithm, which simulates a quantum chaotic dynamics. For this purpose, we perform a forward-backward evolution of an initial state in which two qubits are in a maximally entangled Bell state. If the dynamics is reversed after an evolution time $t_r$, there is an echo of the entanglement between these two qubits at time $t_e=2t_r$. Perturbations attenuate the pairwise entanglement echo and generate entanglement between these two qubits and the other qubits of the quantum computer.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2003-09-19T10:51:22.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum computation",
      "entanglement echoes",
      "quantum computer",
      "efficient quantum algorithm",
      "quantum chaotic dynamics"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. A"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}