{
  "annotation_id": "7a736030-8e96-4db6-a621-81012a1b0813",
  "date_created": "2026-03-02T18:02:41.707000Z",
  "date_modified": "2026-03-02T18:02:41.707000Z",
  "file_hash": "ad67e8248068c481c3eadff7787b5c5201be64b6237965898ecfd5952af645c0",
  "private": false,
  "record": {
    "abstract": "We analyse the electromagnetic coupling in the Kemmer-Duffin-Petiau (KDP)\nequation. Since the KDP--equation which describes spin-0 and spin-1 bosons is\nof Dirac-type, we examine some analogies and differences from the Dirac\nequation. The main difference to the Dirac equation is that the KDP equation\ncontains redundant components. We will show that as a result certain\ninteraction terms in the Hamilton form of the KDP equation do not have a\nphysical meaning and will not affect the calculation of physical observables.\nWe point out that a second order KDP equation derived by Kemmer as an analogy\nto the second order Dirac equation is of limited physical applicability as (i)\nit belongs to a class of second order equations which can be derived from the\noriginal KDP equation and (ii) it lacks a back-transformation which would allow\none to obtain solutions of the KDP equation out of solutions of the second\norder equation. We therefore suggest a different higher order equation which,\nas far as the solutions for the wave functions are concerned, is equivalent to\nthe orginal first order KDP wave equation.",
    "arxiv_id": "quant-ph/9801020",
    "authors": [
      "Marek Nowakowski"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1016/S0375-9601(98)00365-X",
    "journal_ref": "Phys.Lett. A244 (1998) 329-337",
    "title": "The Electromagnetic Coupling in Kemmer-Duffin-Petiau Theory",
    "url": "https://arxiv.org/abs/quant-ph/9801020"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "beefbd49-8281-43af-9714-d03e18acb756",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}