{
  "annotation_id": "0450b0e6-4da2-4ee4-84b2-ad4912b2c526",
  "date_created": "2026-03-02T18:01:55.382000Z",
  "date_modified": "2026-03-02T18:01:55.382000Z",
  "file_hash": "35f8ed5fc4f2ba48dc1f983bdadbb6d2a965f6833dc408c73b92a8ba4a6919f5",
  "private": false,
  "record": {
    "abstract": "For the two-mode exciton system formed by the quasi-spin wave collective\nexcitation of many $\\Lambda$ atoms fixed at the lattice sites of a crystal, we\ndiscover a dynamic symmetry depicted by the semi-direct product algebra\n$SU(2)\\bar{\\otimes} h_2 $ in the large $N$ limit with low excitations. With the\nhelp of the spectral generating algebra method, we obtain a larger class of\nexact zero-eigenvalue states adiabatically interpolating between the initial\nstate of photon-type and the final state of quasi-spin wave exciton-type. The\nconditions for the adiabatic passage of dark states are shown to be valid, even\nwith the presence of the level degeneracy. These theoretical results can lead\nto propose new protocol of implementing quantum memory robust against quantum\ndecoherence.",
    "arxiv_id": "quant-ph/0210189",
    "authors": [
      "C. P. Sun",
      "Y. Li",
      "X. F. Liu"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.mes-hall"
    ],
    "doi": "10.1103/PhysRevLett.91.147903",
    "journal_ref": "Phys. Rev. Lett., 91, 147903 (2003)",
    "title": "Quasi-spin wave quantum memories with dynamic symmetry",
    "url": "https://arxiv.org/abs/quant-ph/0210189"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d38f2c9e-4494-4373-8383-d119998599c8",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}