{
  "annotation_id": "0178bb31-86b5-491c-9f7a-e1a754af3723",
  "date_created": "2026-03-02T18:02:16.590000Z",
  "date_modified": "2026-03-02T18:02:16.590000Z",
  "file_hash": "a141e5856bb722e00cb8bcb49a68d44c0bf64d23b839188378264401d5b57425",
  "private": false,
  "record": {
    "abstract": "The evolution of two qubits coupled by a general nonlocal interaction is\nstudied in two distinct regimes. In the first regime the purity of the\nindividual qubits is interchanged through the entanglement shared by the two.\nWe illustrate how this can be a mechanism for decoherence. In the second\nregime, the interaction entangles two initially pure qubits. The dynamical maps\nfor the reduced unitary evolution of both initially simply separable and\nnot-simply-separable states are found. We outline a protocol for optimizing the\nentanglement generation subject to constraints.",
    "arxiv_id": "quant-ph/0504051",
    "authors": [
      "Cesar A. Rodriguez",
      "Anil Shaji",
      "E. C. G. Sudarshan"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Dynamics of Two Qubits: Decoherence and an Entanglement Optimization   Protocol",
    "url": "https://arxiv.org/abs/quant-ph/0504051"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "59ef6e83-ac28-4de0-be26-e637d81a8845",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}