{
  "annotation_id": "6c34458c-fcbf-4bee-b69f-59d5cf132b95",
  "date_created": "2026-03-02T18:02:16.220000Z",
  "date_modified": "2026-03-02T18:02:16.220000Z",
  "file_hash": "0f2343e618764d7ffe164edad9bc8d54b78d015666a818514e2f09c26669503e",
  "private": false,
  "record": {
    "abstract": "We propose a novel method to generate non-classical states of a single-mode\nmicrowave field, and to produce macroscopic cat states by virtue of a\nthree-level system with $\\Delta$-shaped (or cyclic) transitions. This exotic\nsystem can be implemented by a superconducting quantum circuit with a broken\nsymmetry in its effective potential. Using the cyclic population transfer,\ncontrollable single-mode photon states can be created in the third transition\nwhen two classical fields are applied to induce the other two transitions. This\nis because, for large detuning, two classical fields are equivalent to an\neffective external force, which derives the quantized single mode. Our approach\nis valid not only for superconducting quantum circuits but also for any\nthree-level quantum system with $\\Delta$-shaped transitions",
    "arxiv_id": "quant-ph/0506011",
    "authors": [
      "C. P. Sun",
      "Yu-xi Liu",
      "L. F. Wei",
      "Franco Nori"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Coherent photons and macroscopic cat states generated by a cyclic   artificial atom with broken symmetry",
    "url": "https://arxiv.org/abs/quant-ph/0506011"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "930d09b9-55f5-4774-9b5f-c451b154be77",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}