{
  "annotation_id": "8ee70f36-1051-4b87-8a36-7eecc3d15ce9",
  "date_created": "2026-03-02T18:00:29.429000Z",
  "date_modified": "2026-03-02T18:00:29.429000Z",
  "file_hash": "20c23592f73b3fc9dbed590589e2e514100363cb2cadd1cd14bcdc3a0e680f4d",
  "private": false,
  "record": {
    "abstract": "We discuss a multistep variational approach for the study of many-body\ncorrelations. The approach is developed in a boson formalism (bosons\nrepresenting particle-hole excitations) and based on an iterative sequence of\ndiagonalizations in subspaces of the full boson space. Purpose of these\ndiagonalizations is that of searching for the best approximation of the ground\nstate of the system. The procedure also leads us to define a set of excited\nstates and, at the same time, of operators which generate these states as a\nresult of their action on the ground state. We examine the cases in which these\noperators carry one-particle one-hole and up to two-particle two-hole\nexcitations. We also explore the possibility of associating bosons to\nTamm-Dancoff excitations and of describing the spectrum in terms of only a\nselected group of these. Tests within an exactly solvable three-level model are\nprovided.",
    "arxiv_id": "nucl-th/9909064",
    "authors": [
      "M. Sambataro"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.60.064320",
    "journal_ref": "Phys.Rev. C60 (1999) 064320",
    "title": "Many-body correlations in a multistep variational approach",
    "url": "https://arxiv.org/abs/nucl-th/9909064"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "aff58f74-4a4f-48c6-a576-9783269ae9fa",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}