{
  "annotation_id": "5d405b46-6801-4a70-bb86-8699c5d7ae44",
  "date_created": "2026-03-02T18:02:37.842000Z",
  "date_modified": "2026-03-02T18:02:37.842000Z",
  "file_hash": "e7f09bb29c9451b40d3c244f15b4accfc3e7e9b8709a6780f211f4d128a25a89",
  "private": false,
  "record": {
    "abstract": "A common assumption in quantum field theory is that the energy-momentum\n4-vector of any quantum state must be time-like. However it has been recently\nshown [4] that this is not the case for a Dirac-Maxwell field in the coulomb\ngauge. Here we will present a proof that is simpler then the proof of Ref. [4]\nthat there must exist quantum states which are space-like for a Dirac-Maxwell\nfield in the coulomb gauge.",
    "arxiv_id": "quant-ph/0703257",
    "authors": [
      "Dan Solomon"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Space-like energy momentum in quantum electrodynamics",
    "url": "https://arxiv.org/abs/quant-ph/0703257"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9b4ca4f3-e4fb-4ea9-88e9-9e2e88b0812d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}