{
  "annotation_id": "a09de893-d91b-42b9-922a-6928c52309fc",
  "date_created": "2026-03-02T18:02:24.252000Z",
  "date_modified": "2026-03-02T18:02:24.252000Z",
  "file_hash": "42a015a0233ab3fa62a0568c2034409753db57f1a5c6f4c2e36eca4597454fc2",
  "private": false,
  "record": {
    "abstract": "Based on Yosida\u0027s ground state of the single-impurity Kondo Hamiltonian, we\nstudy three kinds of entanglement between an impurity and conduction electron\nspins. First, it is shown that the impurity spin is maximally entangled with\nall the conduction electrons. Second, a two-spin density matrix of the impurity\nspin and one conduction electron spin is given by a Werner state. We find that\nthe impurity spin is not entangled with one conduction electron spin even\nwithin the Kondo screening length $\\xi_K$, although there is the spin-spin\ncorrelation between them. Third, we show the density matrix of two conduction\nelectron spins is nearly same to that of a free electron gas. The single\nimpurity does not change the entanglement structure of the conduction electrons\nin contrast to the dramatic change in electrical resistance.",
    "arxiv_id": "quant-ph/0601166",
    "authors": [
      "Sangchul Oh",
      "Jaewan Kim"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevB.73.052407",
    "journal_ref": "Physical Review B 73, 052407 (2006)",
    "title": "Entanglement of an impurity and conduction spins in the Kondo model",
    "url": "https://arxiv.org/abs/quant-ph/0601166"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2e9b6b55-6466-4170-b847-216cc9bef27c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}