{
  "annotation_id": "5afe1a58-7689-4db9-bc1a-0e4bb9055771",
  "date_created": "2026-03-02T18:02:13.454000Z",
  "date_modified": "2026-03-02T18:02:13.454000Z",
  "file_hash": "1aa1371ccf048de2c21bc15defc3f76458b29c3a8965282acf65efa4f8521a68",
  "private": false,
  "record": {
    "abstract": "We present a quantum theory of nondegenerate phase-sensitive parametric\namplification in a chi^3 nonlinear medium. The non-zero response time of the\nKerr chi^3 nonlinearity determines the quantum-limited noise figure of chi^3\nparametric amplification, as well as the limit on quadrature squeezing. This\nnon-zero response time of the nonlinearity requires coupling of the parametric\nprocess to a molecular-vibration phonon bath, causing the addition of excess\nnoise through spontaneous Raman scattering. We present analytical expressions\nfor the quantum-limited noise figure of frequency non-degenerate and frequency\ndegenerate chi^3 parametric amplifiers operated as phase-sensitive amplifiers.\nWe also present results for frequency non-degenerate quadrature squeezing. We\nshow that our non-degenerate squeezing theory agrees with the degenerate\nsqueezing theory of Boivin and Shapiro as degeneracy is approached. We have\nalso included the effect of linear loss on the phase-sensitive process.",
    "arxiv_id": "quant-ph/0410214",
    "authors": [
      "Paul L. Voss",
      "Kahraman G. K\u00f6pr\u00fcl\u00fc",
      "Prem Kumar"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Raman-noise induced quantum limits for chi^3 nondegenerate   phase-sensitive amplification and quadrature squeezing",
    "url": "https://arxiv.org/abs/quant-ph/0410214"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a5f88465-4950-440e-8ecf-a0dc87a97c43",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}