{
  "id": "quant-ph/0610006",
  "version": "v1",
  "published": "2006-10-01T08:57:41.000Z",
  "updated": "2006-10-01T08:57:41.000Z",
  "title": "Optimal control of entanglement via quantum feedback",
  "authors": [
    "Stefano Mancini",
    "Howard M. Wiseman"
  ],
  "comment": "10 pages, 5 figures",
  "journal": "Phys. Rev. A 75, 012330 (2007).",
  "doi": "10.1103/PhysRevA.75.012330",
  "categories": [
    "quant-ph"
  ],
  "abstract": "It has recently been shown that finding the optimal measurement on the environment for stationary Linear Quadratic Gaussian control problems is a semi-definite program. We apply this technique to the control of the EPR-correlations between two bosonic modes interacting via a parametric Hamiltonian at steady state. The optimal measurement turns out to be nonlocal homodyne measurement -- the outputs of the two modes must be combined before measurement. We also find the optimal local measurement and control technique. This gives the same degree of entanglement but a higher degree of purity than the local technique previously considered [S. Mancini, Phys. Rev. A {\\bf 73}, 010304(R) (2006)].",
  "revisions": [
    {
      "version": "v1",
      "updated": "2006-10-01T08:57:41.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "optimal control",
      "quantum feedback",
      "stationary linear quadratic gaussian control",
      "linear quadratic gaussian control problems",
      "entanglement"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. A"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}