{
  "annotation_id": "8a493835-fea4-4605-8d88-da5d196df607",
  "date_created": "2026-03-02T18:02:20.088000Z",
  "date_modified": "2026-03-02T18:02:20.088000Z",
  "file_hash": "4da8010dbe11203ec3875177843ba169895bafd73807ba153af4a7961a73ed11",
  "private": false,
  "record": {
    "abstract": "We present a consistent quantum theory of the electromagnetic field in\nnonlinearly responding causal media, with special emphasis on $\\chi^{(2)}$\nmedia. Starting from QED in linearly responding causal media, we develop a\nmethod to construct the nonlinear Hamiltonian expressed in terms of the complex\nnonlinear susceptibility in a quantum mechanically consistent way. In\nparticular we show that the method yields the nonlinear noise polarization,\nwhich together with the linear one is responsible for intrinsic quantum\ndecoherence.",
    "arxiv_id": "quant-ph/0508122",
    "authors": [
      "Stefan Scheel",
      "Dirk-Gunnar Welsch"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.96.073601",
    "title": "Quantum theory of light and noise polarization in nonlinear optics",
    "url": "https://arxiv.org/abs/quant-ph/0508122"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "87915120-9cda-4640-96f7-fe13dd359a93",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}