{
  "abstract": "Quantum gas microscopy provides single-shot access to many-body configurations, yet has so far relied on pinning atoms to a discrete lattice during fluorescence readout. Here, we realize ultrafast atom-resolved fluorescence microscopy of an ultracold $^{162}$Dy gas directly in free space, with all external confinement removed during imaging. Exploiting the large mass and broad optical transition of dysprosium together with a high numerical aperture in-vacuum objective, we detect single atoms within $4\\,μ\\mathrm{s}$ while maintaining an effective point-spread function with a full width at half maximum of $254.8(3)\\,\\mathrm{nm}$. We achieve a single-atom conditional classification fidelity of $99.72(3)\\%$ for identified fluorescence candidates. We use the measured single-atom response to construct a statistical configuration-inference model that recovers atomic positions and multiplicities, coming from overlapping atoms, directly from single fluorescence snapshots. We further benchmark our reconstruction algorithm through end-to-end Monte Carlo simulations with known ground-truth atomic configurations, obtaining a reconstruction fidelity of $98.7\\%$. Our approach, applicable to a wide variety of atomic species, extends quantum gas microscopy beyond predefined detection lattices, enabling atom-resolved measurements of counting statistics and higher-order spatial correlations directly on the intrinsic length scales of continuum many-body systems.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.18994",
  "author_total": 6,
  "authors": [
    {
      "name": "Andrea Litvinov"
    },
    {
      "name": "Clemens Ulm"
    },
    {
      "name": "Eva Casotti"
    },
    {
      "name": "Gerard Solà Berga"
    },
    {
      "name": "Manfred J. Mark"
    },
    {
      "name": "Francesca Ferlaino"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/a7rj610jfnjvn.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.18994",
  "fulltext_url": null,
  "id": "a7rj610jfnjvn",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.18994",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.quant-gas"
    ],
    [
      "openalex",
      "3107|Cold Atom Physics and Bose-Einstein Condensates"
    ]
  ],
  "openalex": "W7222226385",
  "pdf_url": "https://arxiv.org/pdf/2610.18994",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-23",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/a7rj610jfnjvn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:15Z",
      "native_id": "2610.18994",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.18994"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "amo"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Full-Continuum Ultrafast Quantum Gas Microscopy",
  "title_text": "Full-Continuum Ultrafast Quantum Gas Microscopy",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:15Z",
  "url": "https://research.draconitic.com/paper/a7rj610jfnjvn",
  "venue": "arXiv",
  "versions": []
}