{
  "abstract": "We develop a generalized finite-temperature proton-neutron BCS framework using the superoperator formalism, incorporating both isovector and isoscalar monopole pairing channels. Numerical calculations for a schematic equidistant multilevel model and realistic even-even Ge isotopes demonstrate the emergence of proton-neutron ($pn$) pairing reentrance in even-even asymmetric ($N>Z$) nuclei with preexisting like-nucleon pairing correlations. This nonmonotonic behavior arises from thermal excitations that partially lift Pauli blocking of single-particle orbitals near the chemical potentials, thereby enlarging the phase space for $pn$ pair formation. We uncover a delicate interplay between thermal unblocking and like-nucleon pairing, which can either suppress or enhance $pn$ correlations depending on temperature and shell filling. A qualitative analysis of Fermi charge-exchange strength functions in hot $^{72}$Ge, which neglects the residual interaction between thermal quasiparticles, suggests that $pn$ pairing reentrance may alter the transition strength distribution around $T\\approx1$~MeV. This indicates that finite-temperature $pn$ correlations could potentially impact stellar weak-interaction rates in $rp$-process and supernova environments.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Physical Review C 114, 034303 (2026)",
  "arxiv": "2609.06638",
  "author_total": 4,
  "authors": [
    {
      "name": "T. Vu Dong"
    },
    {
      "name": "Alan A. Dzhioev"
    },
    {
      "name": "A. I. Vdovin"
    },
    {
      "name": "N. Quang Hung"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3t4vx5jzn6c1h.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.06638",
  "fulltext_url": null,
  "id": "3t4vx5jzn6c1h",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.06638",
  "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": null,
  "pdf_url": "https://arxiv.org/pdf/2609.06638",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-06",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3t4vx5jzn6c1h.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:48Z",
      "native_id": "2609.06638",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.06638"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:nucl-th",
      "subfield": "nuclear"
    }
  ],
  "title": "Reentrance of proton-neutron pairing in hot nuclear systems",
  "title_text": "Reentrance of proton-neutron pairing in hot nuclear systems",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:48Z",
  "url": "https://research.draconitic.com/paper/3t4vx5jzn6c1h",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/g1j9-wwp2",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}