{
  "annotation_id": "aa853080-c550-4fb1-9da2-3d69faa84fe3",
  "date_created": "2026-03-02T18:02:31.045000Z",
  "date_modified": "2026-03-02T18:02:31.045000Z",
  "file_hash": "e4c8582398661cbfacef3e467fbf2a6b81f525b6326c43a0ac1921e8bb88647b",
  "private": false,
  "record": {
    "abstract": "In this work we find explicitly the decoherence free subspace (DFS) for a two\ntwo-level system in a common squeezed vacuum bath. We also find an orthogonal\nbasis for the DFS composed of a symmetrical and an antisymmetrical (under\nparticle permutation) entangled state. For any initial symmetrical state, the\nmaster equation has one stationary state which is the symmetrical entangled\ndecoherence free state. In this way, one can generate entanglement via common\nsqueezed bath of the two systems. If the initial state does not have a definite\nparity, the stationary state depends strongly on the initial conditions of the\nsystem and it has a statistical mixture of states which belong to the DFS. We\nalso study the effect of the coupling between the two-level systems on the DFS.",
    "arxiv_id": "quant-ph/0611090",
    "authors": [
      "D. Mundarain",
      "M. Orszag"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.75.040303",
    "title": "Decoherence Free Subspace and entanglement by interaction with a common   squeezed bath",
    "url": "https://arxiv.org/abs/quant-ph/0611090"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "71f28bdb-227a-4f6c-af80-7af030bc7603",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}