{
  "annotation_id": "366ed9bc-f58c-4269-a780-9813ef5d76d6",
  "date_created": "2026-03-02T18:02:33.703000Z",
  "date_modified": "2026-03-02T18:02:33.703000Z",
  "file_hash": "d6ceb95e6982b429b76e37e6d2d481c076830fca9bee53114b87dd8a0aa187e0",
  "private": false,
  "record": {
    "abstract": "We propose an experimentally feasible architecture with controllable\nlong-range couplings built up from local exchange interactions. The scheme\nconsists of a spin-bus, with strong, always-on interactions, coupled\ndynamically to external qubits of the Loss and DiVincenzo type. Long-range\ncorrelations are enabled by a spectral gap occurring in a finite-size chain.\nThe bus can also form a hub for multiqubit entangling operations. We show how\nmultiqubit gates may be used to efficiently generate $W$-states (an important\nentanglement resource). The spin-bus therefore provides a route for scalable\nsolid-state quantum computation, using currently available experimental\nresources.",
    "arxiv_id": "quant-ph/0702228",
    "authors": [
      "Mark Friesen",
      "Asoka Biswas",
      "Xuedong Hu",
      "Daniel Lidar"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.mes-hall"
    ],
    "doi": "10.1103/PhysRevLett.98.230503",
    "journal_ref": "Phys. Rev. Lett. v98, p230503 (2007)",
    "title": "Efficient multiqubit entanglement via a spin-bus",
    "url": "https://arxiv.org/abs/quant-ph/0702228"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e3d6be97-7a9c-4d1b-8a59-d2232a5f44dd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}