{
  "annotation_id": "7e5aae55-afa6-4844-a4e1-4e4c833c2b5f",
  "date_created": "2026-03-02T18:01:55.601000Z",
  "date_modified": "2026-03-02T18:01:55.601000Z",
  "file_hash": "1e944292a7c5c5f516f72190ace0e2c47696d11cf31cae43f1e2deb39199ced6",
  "private": false,
  "record": {
    "abstract": "We show that spin squeezing implies pairwise entanglement for arbitrary\nsymmetric multiqubit states. If the squeezing parameter is less than or equal\nto 1, we demonstrate a quantitative relation between the squeezing parameter\nand the concurrence for the even and odd states. We prove that the even states\ngenerated from the initial state with all qubits being spin down, via the\none-axis twisting Hamiltonian, are spin squeezed if and only if they are\npairwise entangled. For the states generated via the one-axis twisting\nHamiltonian with an external transverse field for any number of qubits greater\nthan 1 or via the two-axis counter-twisting Hamiltonian for any even number of\nqubits, the numerical results suggest that such states are spin squeezed if and\nonly if they are pairwise entangled.",
    "arxiv_id": "quant-ph/0302014",
    "authors": [
      "Xiaoguang Wang",
      "Barry C. Sanders"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.68.012101",
    "journal_ref": "Phys. Rev. A 68, 012101 (2003).",
    "title": "Spin squeezing and pairwise entanglement for symmetric multiqubit states",
    "url": "https://arxiv.org/abs/quant-ph/0302014"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e881b690-a760-4817-b8b7-d05e4503af3a",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}