{
  "annotation_id": "06fc0ffa-aaeb-4589-9a2f-32136643cce8",
  "date_created": "2026-03-02T18:01:49.144000Z",
  "date_modified": "2026-03-02T18:01:49.144000Z",
  "file_hash": "9bcfe09fbbd40d6cb1867496ab327948e198605bada8d0de7a73cb3e01d9223d",
  "private": false,
  "record": {
    "abstract": "We propose a feedback scheme for the production of two-mode spin squeezing.\nWe determine a general expression for the optimal feedback, which is also\napplicable to the case of single-mode spin squeezing. The two-mode spin\nsqueezed states obtained via this feedback are optimal for j=1/2 and are very\nclose to optimal for j\u003e1/2. In addition, the master equation suggests a\nHamiltonian that would produce two-mode spin squeezing without feedback, and is\nanalogous to the two-axis countertwisting Hamiltonian in the single mode case.",
    "arxiv_id": "quant-ph/0203081",
    "authors": [
      "Dominic W. Berry",
      "Barry C. Sanders"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.66.012313",
    "journal_ref": "Phys. Rev. A 66, 012313 (2002)",
    "title": "Near-optimal two-mode spin squeezing via feedback",
    "url": "https://arxiv.org/abs/quant-ph/0203081"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c0207b74-352f-4915-ba94-a5e33d961df3",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}