{
  "abstract": "Single-molecule probes are widely used to characterize dynamic heterogeneity in glass-forming liquids, but their measured dynamics can depend on how the probe couples to its host environment. Using molecular dynamics simulations of dilute dimer probes embedded in a supercooled polymer melt, we examine how probe--host affinity influences the correspondence between probe rotational relaxation and host dynamics. Increasing the probe--host interaction strength systematically modifies the relative temperature dependence of probe and host relaxation while leaving the intrinsic host dynamics essentially unperturbed. Lower-affinity probes exhibit stronger non-Gaussian translational motion and larger displacement fluctuations, whereas higher-affinity probes remain more localized and are statistically less exposed to the most dynamically active host environments. Comparison with wavevector-dependent host structural relaxation further identifies an effective matching wavevector at which the host structural relaxation exhibits the temperature dependence most similar to that of the probe, providing a phenomenological measure of the probe--host dynamical correspondence. Together with real-space analyses of the local environments sampled by the probe, these results show that probe--host affinity systematically influences the quantitative relationship between molecular-probe relaxation and heterogeneous host dynamics.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2605.21298",
  "author_total": 2,
  "authors": [
    {
      "name": "Suyeon Kim"
    },
    {
      "name": "Taejin Kwon"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/emfpzay4nyxdq.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.21298",
  "fulltext_url": null,
  "id": "emfpzay4nyxdq",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.21298",
  "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.soft"
    ],
    [
      "openalex",
      "2505|Material Dynamics and Properties"
    ]
  ],
  "openalex": "W7161988800",
  "pdf_url": "https://arxiv.org/pdf/2605.21298",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-26",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/emfpzay4nyxdq.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:12Z",
      "native_id": "2605.21298",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.21298"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.soft",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Interaction-Dependent Molecular Probing of Heterogeneous Glassy Dynamics in Polymer Melts",
  "title_text": "Interaction-Dependent Molecular Probing of Heterogeneous Glassy Dynamics in Polymer Melts",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:12Z",
  "url": "https://research.draconitic.com/paper/emfpzay4nyxdq",
  "venue": "arXiv",
  "versions": []
}