{
  "annotation_id": "4058a6e9-1975-4416-a5b8-938ab68c801c",
  "date_created": "2026-03-02T18:02:22.888000Z",
  "date_modified": "2026-03-02T18:02:22.888000Z",
  "file_hash": "e4baa60cd6b7801a2f894ba816e002839d6648e81d73178404a3ac23fbb67755",
  "private": false,
  "record": {
    "abstract": "I show that the decoherence in a system of $N$ degenerate two--level atoms\ninteracting with a bosonic heat bath is for any number of atoms $N$ governed by\na generalized Hamming distance (called ``decoherence metric\u0027\u0027) between the\nsuperposed quantum states, with a time--dependent metric tensor that is\nspecific for the heat bath.The decoherence metric allows for the complete\ncharacterization of the decoherence of all possible superpositions of\nmany-particle states, and can be applied to minimize the over-all decoherence\nin a quantum memory. For qubits which are far apart, the decoherence is given\nby a function describing single-qubit decoherence times the standard Hamming\ndistance. I apply the theory to cold atoms in an optical lattice interacting\nwith black body radiation.",
    "arxiv_id": "quant-ph/0511262",
    "authors": [
      "Daniel Braun"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.96.230502",
    "journal_ref": "Phys. Rev. Lett. 96, 230502 (2006)",
    "title": "Decoherence in a system of many two--level atoms",
    "url": "https://arxiv.org/abs/quant-ph/0511262"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9c5f9738-a85d-44ec-95ed-17b457e2c993",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}