{
  "id": "0711.1078",
  "version": "v2",
  "published": "2007-11-07T13:08:27.000Z",
  "updated": "2007-11-08T08:58:05.000Z",
  "title": "Comment on \"Reply to Comment on Time-dependent Quasi-Hermitian Hamiltonians and the Unitary Quantum Evolution\"",
  "authors": [
    "Ali Mostafazadeh"
  ],
  "comment": "3 pages",
  "categories": [
    "quant-ph"
  ],
  "abstract": "I point out that if one defines the operator $U_R(t)$ as done by M. Znojil in his reply [arXiv:0711.0514v1] to my comment [arXiv:0711.0137v1] and also accepts the validity of the defining relation of $U_R(t)$ as given in his paper [arXiv:0710.5653v1], one finds that the time-evolution of the associated quantum system is not governed by the Schr\\\"odinger equation for the Hamiltonian operator $H$ but an operator $H'$ which differs from $H$ if the metric operator is time-dependent. In the latter case this effective Hamiltonian $H'$ is not observable. This is consistent with the conclusions of my paper [Phys. Lett. B 650, 208 (2007), arXiv:0706.1872v2] which allow for unitary time-evolution generated by unobservable Hamiltonians.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2007-11-08T08:58:05.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "time-dependent quasi-hermitian hamiltonians",
      "unitary quantum evolution",
      "hamiltonian operator",
      "unitary time-evolution",
      "associated quantum system"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 3,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2007arXiv0711.1078M"
    }
  }
}