{
  "annotation_id": "9d5df57b-985e-40d5-8f25-15684f85f01b",
  "date_created": "2026-03-02T18:02:44.335000Z",
  "date_modified": "2026-03-02T18:02:44.335000Z",
  "file_hash": "a05176fbaa6c0e93ce595e160dc8b4c5ba64614c9ed6c35b79f23a8216d4f668",
  "private": false,
  "record": {
    "abstract": "By using the invariant method we find one-parameter squeezed Gaussian states\nfor both time-independent and time-dependent oscillators. The squeezing\nparameter is expressed in terms of energy expectation value for\ntime-independent case and represents the degree of mixing positive and negative\nfrequency solutions for time-dependent case. A {\\it minimum uncertainty\nproposal} is advanced to select uniquely vacuum states at each moment of time.\nWe show that the Gaussian states with minimum uncertainty coincide with the\ntrue vacuum state for time-independent oscillator and the Bunch-Davies vacuum\nfor a massive scalar field in a de Sitter spacetime.",
    "arxiv_id": "quant-ph/9806096",
    "authors": [
      "Jung Kon Kim",
      "Sang Pyo Kim"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/0305-4470/32/14/012",
    "journal_ref": "J.Phys.A32:2711-2718,1999",
    "title": "One-Parameter Squeezed Gaussian States of Time-Dependent Harmonic   Oscillator and Selection Rule for Vacuum States",
    "url": "https://arxiv.org/abs/quant-ph/9806096"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "08ff6695-0140-47a8-87c6-1d2764f8902d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}