{
  "id": "quant-ph/0602139",
  "version": "v6",
  "published": "2006-02-16T15:58:02.000Z",
  "updated": "2008-05-23T18:40:48.000Z",
  "title": "Multi-level, multi-party singlets as ground states and their role in entanglement distribution",
  "authors": [
    "Christopher Hadley",
    "Sougato Bose"
  ],
  "comment": "Corrected method for physical preparation",
  "journal": "Phys. Rev. A 77, 050308(R) (2008)",
  "doi": "10.1103/PhysRevA.77.050308",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We show that a singlet of many multi-level quantum systems arises naturally as the ground state of a physically-motivated Hamiltonian. The Hamiltonian simply exchanges the states of nearest-neighbours in some network of qudits (d-level systems); the results are independent of the strength of the couplings or the network's topology. We show that local measurements on some of these qudits project the unmeasured qudits onto a smaller singlet, regardless of the choice of measurement basis at each measurement. It follows that the entanglement is highly persistent, and that through local measurements, a large amount of entanglement may be established between spatially-separated parties for subsequent use in distributed quantum computation.",
  "revisions": [
    {
      "version": "v6",
      "updated": "2008-05-23T18:40:48.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "ground state",
      "entanglement distribution",
      "multi-party singlets",
      "local measurements",
      "multi-level quantum systems arises"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. A"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}