{
  "abstract": "We extend the functional determinant approach (FDA), previously restricted to static impurities, to the case of finite-mass impurities by using the mass-gap description of Fermi polarons [Phys. Rev. Lett. 135, 193401 (2025)]. The quadratic structure of the mass-gap model enables the exact evaluation of many-body spectra and Ramsey dynamics for mobile impurities. We show that this mass-gap FDA smoothly interpolates between the Fermi-edge singularity for infinitely heavy impurities and the emergence of quasiparticle weight for finite impurity mass. Our results demonstrate that the mass-gap FDA provides a transparent and computationally efficient framework to describe the quantum dynamics of mobile impurities.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.30539",
  "author_total": 4,
  "authors": [
    {
      "name": "Emilio Ramos Rodríguez"
    },
    {
      "name": "Eugen Dizer"
    },
    {
      "name": "Xin Chen"
    },
    {
      "name": "Richard Schmidt"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/02cnceargxdme.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.30539",
  "fulltext_url": null,
  "id": "02cnceargxdme",
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  "landing_url": "https://arxiv.org/abs/2608.30539",
  "language": null,
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  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.quant-gas"
    ],
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      "arxiv",
      "cond-mat.str-el"
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      "arxiv",
      "math-ph"
    ],
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      "arxiv",
      "math.MP"
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      "arxiv",
      "quant-ph"
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    [
      "openalex",
      "3107|Cold Atom Physics and Bose-Einstein Condensates"
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  "openalex": "W7204882710",
  "pdf_url": "https://arxiv.org/pdf/2608.30539",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-31",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/02cnceargxdme.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:41Z",
      "native_id": "2608.30539",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.30539"
    }
  ],
  "subjects": [
    {
      "field": "mathematics",
      "origin": "arxiv:math-ph",
      "subfield": "mathematical-physics"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "amo"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Mass-gap functional determinant approach for mobile Fermi polarons",
  "title_text": "Mass-gap functional determinant approach for mobile Fermi polarons",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:48Z",
  "url": "https://research.draconitic.com/paper/02cnceargxdme",
  "venue": "arXiv",
  "versions": []
}