{
  "annotation_id": "abb849e6-e4a2-4e74-bf82-55d7042267c4",
  "date_created": "2026-03-02T18:01:53.120000Z",
  "date_modified": "2026-03-02T18:01:53.120000Z",
  "file_hash": "5d278e54423e18b6fadacadc0fedf87fbc15bbf929b075906085bf40393d8fb6",
  "private": false,
  "record": {
    "abstract": "Causality imposes strong restrictions on the type of operators that may be\nobservables in relativistic quantum theories. In fact, causal violations arise\nwhen computing conditional probabilities for certain partial causally connected\nmeasurements using the standard non covariant procedure. Here we introduce\nanother way of computing conditional probabilities, based on an intrinsic\ncovariant relational order of the events, which differs from the standard one\nwhen these type of measurements are included. This alternative procedure is\ncompatible with a wider and very natural class of operators without breaking\ncausality. If some of these measurements could be implemented in practice as\npredicted by our formalism, the non covariant, conventional approach should be\nabandoned. Furthermore, the description we promote here would imply a new\nphysical effect where interference terms are suppressed as a consequence of the\ncovariant order in the measurement process.",
    "arxiv_id": "quant-ph/0209044",
    "authors": [
      "Rodolfo Gambini",
      "Rafael A. Porto"
    ],
    "categories": [
      "quant-ph",
      "gr-qc"
    ],
    "doi": "10.1088/1367-2630/5/1/105",
    "journal_ref": "New J.Phys. 5 (2003) 105",
    "title": "A physical distinction between a covariant and non covariant reduction   process in relativistic quantum theories",
    "url": "https://arxiv.org/abs/quant-ph/0209044"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "cb4eedf7-b2eb-49b0-9ea1-24be1fa99bcb",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}