{
  "annotation_id": "3cec0f3f-bc47-4f7b-9e23-eeab0c2966d3",
  "date_created": "2026-03-02T18:02:17.097000Z",
  "date_modified": "2026-03-02T18:02:17.097000Z",
  "file_hash": "6fd60009bd074aa7845176c8f3939ed02edf97f6a57516616694f4edcfa0cd71",
  "private": false,
  "record": {
    "abstract": "The entanglement of two qubits, each defined as an effective two-level, spin\n1/2 system, is investigated for the case that the qubits interact via a\nHeisenberg XY interaction and are subject to decoherence due to population\nrelaxation and thermal effects. For zero temperature, the time dependent\nconcurrence is studied analytically and numerically for some typical initial\nstates, including a separable (unentangled) initial state. An analytical\nformula for non-zero steady state concurrence is found for any initial state,\nand optimal parameter values for maximizing steady state concurrence are given.\nThe steady state concurrence is found analytically to remain non-zero for low,\nfinite temperatures. We also identify the contributions of global and local\ncoherence to the steady state entanglement.",
    "arxiv_id": "quant-ph/0503116",
    "authors": [
      "Jin Wang",
      "Herman Batelaan",
      "Jeremy Podany",
      "Anthony F. Starace"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/0953-4075/39/21/001",
    "journal_ref": "J.Phys. B 39, 4343-4353 (2006)",
    "title": "Entanglement Evolution in the Presence of Decoherence",
    "url": "https://arxiv.org/abs/quant-ph/0503116"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "7c659ff8-1d2f-479a-933f-959a72b2fdf1",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}