{
  "annotation_id": "4beedb1b-1225-400a-92b5-c0ed4852a081",
  "date_created": "2026-03-02T18:01:56.068000Z",
  "date_modified": "2026-03-02T18:01:56.068000Z",
  "file_hash": "a5a4bd611a1d02281865b6bb9bab6fa9cf18c3c3e6f454c3971d9c90985dc624",
  "private": false,
  "record": {
    "abstract": "We propose construction of a unique and definite metric ($\\eta_+$),\ntime-reversal operator (T) and an inner product such that the pseudo-Hermitian\nmatrix Hamiltonians are C, PT, and CPT invariant and PT(CPT)-norm is indefinite\n(definite). Here, P and C denote the generalized symmetries : parity and\ncharge-conjugation respectively. The limitations of the other current\napproaches have been brought out.",
    "arxiv_id": "quant-ph/0302141",
    "authors": [
      "Zafar Ahmed"
    ],
    "categories": [
      "quant-ph",
      "math-ph",
      "math.MP"
    ],
    "doi": "10.1088/0305-4470/36/37/309",
    "title": "C, PT, and CPT invariance of pseudo-Hermitian Hamiltonians",
    "url": "https://arxiv.org/abs/quant-ph/0302141"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "49edd16d-1a26-4502-9c3a-f81f795885f7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}