{
  "annotation_id": "59bc90f7-2928-4047-b817-e54455f84f04",
  "date_created": "2026-03-02T18:02:23.834000Z",
  "date_modified": "2026-03-02T18:02:23.834000Z",
  "file_hash": "fbc8978948f490deb6329a646861ad0013102a20e8ca0bcf703332d7abdfe4d7",
  "private": false,
  "record": {
    "abstract": "A formalism for energy-dependent many-body perturbation theory (MBPT),\npreviously indicated in our recent review articles (Lindgren et al., Phys.Rep.\n389,161(2004), Can.J.Phys. 83,183(2005)), is developed in more detail. The\nformalism allows for a mixture of energy-dependent (retarded) and\nenergy-independent (instantaneous) interactions and hence for a merger of QED\nand standard (relativistic) MBPT. This combination is particularly important\nfor light elements, such as light heliumlike ions, where electron correlation\nis pronounced. It can also be quite significant in the medium-heavy mass range,\nas recently discussed by Fritzsche et al. (J.Phys. B38,S707(2005)), with the\nconsequence that the effects might be significant also in analyzing the data of\nexperiments with highly charged ions. A numerical procedure for treating the\ncombined effect is described, and some preliminary numerical results are given\nfor heliumlike ions. This represent the first numerical evaluation of effects\nbeyond two-photon exchange involving a retarded interaction. It is found that\nfor heliumlike neon the effect of one retarded photon (with Coulomb\ninteractions of all orders) represents about 99% of the non-radiative effects\nbeyond energy-independent MBPT.",
    "arxiv_id": "quant-ph/0602058",
    "authors": [
      "Ingvar Lindgren",
      "Sten Salomonson",
      "Daniel Hedendahl"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.73.062502",
    "title": "Many-body perturbation procedure for energy-dependent perturbation:   Merging many-body perturbation theory with QED",
    "url": "https://arxiv.org/abs/quant-ph/0602058"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e5f6da3b-f47e-4e3b-89f0-45ab0f7484fe",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}