{
  "annotation_id": "3d731ceb-890e-4064-9565-db23aea7717c",
  "date_created": "2026-03-02T18:02:10.337000Z",
  "date_modified": "2026-03-02T18:02:10.337000Z",
  "file_hash": "86ba8231d227d0a6b85c9a4d050723836cf599f68a1886c5866313c51570b58e",
  "private": false,
  "record": {
    "abstract": "We explore the physical mechanism to coherently transfer the quantum\ninformation of spin by connecting two spins to an isotropic antiferromagnetic\nspin ladder system as data bus. Due to a large spin gap existing in such a\nperfect medium, the effective Hamiltonian of the two connected spins can be\narchived as that of Heisenberg type, which possesses a ground state with\nmaximal entanglement. We show that the effective coupling strength is inversely\nproportional to the distance of the two spins and thus the quantum information\ncan be transferred between the two spins separated by a longer distance, i.e.\nthe characteristic time of quantum state transferring linearly depends on the\ndistance.",
    "arxiv_id": "quant-ph/0406159",
    "authors": [
      "Y. Li",
      "T. Shi",
      "B. Chen",
      "Z. Song",
      "C. P. Sun"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.str-el"
    ],
    "doi": "10.1103/PhysRevA.71.022301",
    "journal_ref": "Phys. Rev. A 71, 022301 (2005)",
    "title": "Quantum state transmission via a spin ladder as a robust data bus",
    "url": "https://arxiv.org/abs/quant-ph/0406159"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e73c962b-4ca8-4e24-a2ec-d4b23d4b4841",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}