{
  "abstract": "Nonlinear spectroscopy is widely used to probe ultrafast dynamics in matter. Signals of higher nonlinear orders encode valuable many-body dynamics but only recently have become individually retrievable. However, their physical interpretation in terms of double-sided Feynman diagrams is cumbersome and non-intuitive. Here, we establish an alternative framework that connects them to the underlying excitation conditions and many-body interactions. This approach predicts two classes of dynamic nonlinearities, due either to direct many-body interactions or to saturable kinetic channels. The method provides a direct physical interpretation of the retrieved signals, explaining their sign, magnitude, and dynamics. It also enables model-free reconstruction of the dynamics of a sub-ensemble of particles starting with a given number of excitons, which we demonstrate to be especially insightful. We validate the framework using colloidal CdSe/CdS core/shell quantum dots, which enable us to model nonlinearities of both classes in isolation and also combined.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.07213",
  "author_total": 8,
  "authors": [
    {
      "name": "Diego Florio"
    },
    {
      "name": "Alessandro Baserga"
    },
    {
      "name": "Sofia Bertuetti"
    },
    {
      "name": "Federico Visentin"
    },
    {
      "name": "Adar Levi"
    },
    {
      "name": "Uri Banin"
    },
    {
      "name": "Giulio Cerullo"
    },
    {
      "name": "Franco V. A. Camargo"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9v1smx6h7ph0t.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.07213",
  "fulltext_url": null,
  "id": "9v1smx6h7ph0t",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.07213",
  "language": null,
  "licence": "CC-BY-NC-SA-4.0",
  "licence_label": "CC BY-NC-SA 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.chem-ph"
    ],
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "openalex",
      "3107|Laser-Matter Interactions and Applications"
    ]
  ],
  "openalex": "W7221051389",
  "pdf_url": "https://arxiv.org/pdf/2610.07213",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-05",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/9v1smx6h7ph0t.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:22Z",
      "native_id": "2610.07213",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.07213"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "arxiv:physics.chem-ph",
      "subfield": "physical"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Many-body Interactions in Ultrafast Spectroscopy",
  "title_text": "Many-body Interactions in Ultrafast Spectroscopy",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:22Z",
  "url": "https://research.draconitic.com/paper/9v1smx6h7ph0t",
  "venue": "arXiv",
  "versions": []
}