{
  "abstract": "Exciton--exciton-interaction pump--probe spectroscopy (EEI--PP) captures the fifth-order signal of light-matter interaction, directly probing exciton--exciton annihilation. This allows studying excitation energy transport even in extended, nearly isoenergetic landscapes. Although spectrally resolved fifth-order signals have already been explored in simplified cases, in larger systems only spectrally integrated signals have been analyzed. We present a microscopic theoretical description for spectrally resolved EEI--PP response with realistic lineshapes, revealing how single- and multi-exciton state structure shape the spectral features and dynamics. The description is applicable to large molecular systems such as squaraine polymers, facilitating a direct comparison with experimental spectra. By a decomposition of the total signal into individual excitation pathways, we demonstrate that the spectral resolution is needed to distinguish otherwise intertwined single- and multi-exciton dynamics, such as single-exciton relaxation and exciton--exciton annihilation.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.29041",
  "author_total": 3,
  "authors": [
    {
      "name": "Kateřina Charvátová"
    },
    {
      "name": "Matteo Bruschi"
    },
    {
      "name": "Pavel Malý"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dksnvdfcqb1p2.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.29041",
  "fulltext_url": null,
  "id": "dksnvdfcqb1p2",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.29041",
  "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",
      "physics.chem-ph"
    ],
    [
      "openalex",
      "3107|Spectroscopy and Quantum Chemical Studies"
    ]
  ],
  "openalex": "W7204938448",
  "pdf_url": "https://arxiv.org/pdf/2608.29041",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dksnvdfcqb1p2.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:41Z",
      "native_id": "2608.29041",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.29041"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "arxiv:physics.chem-ph",
      "subfield": "physical"
    }
  ],
  "title": "Simulating spectrally resolved exciton--exciton-interaction pump--probe spectroscopy",
  "title_text": "Simulating spectrally resolved exciton--exciton-interaction pump--probe spectroscopy",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:41Z",
  "url": "https://research.draconitic.com/paper/dksnvdfcqb1p2",
  "venue": "arXiv",
  "versions": []
}