{
  "abstract": "We construct a density-dependent covariant energy density functional (CE-ME1) from full-Dirac-space relativistic Brueckner--Hartree--Fock (RBHF) self-energies and the corresponding equation of state. The space-like component $U_V$ is incorporated at the Fermi surface through reduced scalar and time-like self-energies, which are mapped onto local Hartree $σ$, $ω$, $δ$, and $ρ$ channels. The density-dependent couplings are represented by cubic Chebyshev polynomials over the density range $0.08\\leqρ\\leq0.48~{\\rm fm}^{-3}$. A constrained thermodynamic calibration uses 199 RBHF energy-per-particle values from published microscopic computations at six isospin asymmetries, while maintaining positive, monotonic couplings. The Bonn-A RBHF saturation point, incompressibility $K_\\infty=258$ MeV, symmetry energy $J=33.1$ MeV, and slope $L=65.2$ MeV are reproduced. The predicted curvature $K_{\\rm sym}=33$ MeV differs from the published RBHF value of $-67$ MeV, illustrating the derivative sensitivity of the local reduction. The combined energy RMS is $0.613$ MeV, measuring model discrepancy rather than statistical uncertainty. Uniform matter remains mechanically stable and causal above saturation within the calibrated range. In cold charge-neutral $npeμ$ matter, CE-ME1 reasonably reproduces the interpolated RBHF pressure and proton fraction over most of the interval, although the pressure discrepancy increases near its upper edge. The DD-ME2 benchmark is stiffer and predicts a lower proton fraction at high density.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.36299",
  "author_total": 1,
  "authors": [
    {
      "name": "Armen Sedrakian"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/cva3pyfdcqmcy.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.36299",
  "fulltext_url": null,
  "id": "cva3pyfdcqmcy",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.36299",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "nucl-th"
    ],
    [
      "openalex",
      "3106|Nuclear physics research studies"
    ]
  ],
  "openalex": "W7224101208",
  "pdf_url": "https://arxiv.org/pdf/2610.36299",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-26",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/cva3pyfdcqmcy.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:50Z",
      "native_id": "2610.36299",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.36299"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:nucl-th",
      "subfield": "nuclear"
    }
  ],
  "title": "Chebyshev-expanded covariant density functional from relativistic Brueckner theory",
  "title_text": "Chebyshev-expanded covariant density functional from relativistic Brueckner theory",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:50Z",
  "url": "https://research.draconitic.com/paper/cva3pyfdcqmcy",
  "venue": "arXiv",
  "versions": []
}