{
  "abstract": "The first-order coherence properties of strongly coupled systems supporting polariton lasing and Bose-Einstein condensation (BEC) have been thoroughly studied and show consistent results. In contrast, second-order coherence properties have been found to vary for different systems, and the second-order coherence function can deviate from the value of one, typical for atomic BEC, revealing super-Poissonian fluctuations even above the BEC/polariton lasing threshold. This calls for a deeper understanding of the emission statistics and dynamics in light-based condensates, especially in the non-equilibrium regime. Here we demonstrate a coherent state of polariton emission from a plasmonic lattice measured as the second-order coherence function value separately for $\\mathrmΓ$- and non-$\\mathrmΓ$-point radiation (ground state and high-energy tail). We observe a high degree of coherence with the value $g^{(2)}(τ=0)-1<10^{-4}$. We also demonstrate the ultrafast ($>$1 THz) nature of the dynamics. The process can be interpreted as a BEC with ultrafast, sub-50-fs thermalization, but we also suggest an alternative explanation as superradiance in a system where the emitters have vibrational degrees of freedom.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.37142",
  "author_total": 5,
  "authors": [
    {
      "name": "Evgeny A. Mamonov"
    },
    {
      "name": "Lukas Freter"
    },
    {
      "name": "Sioneh Eyvazi"
    },
    {
      "name": "Elliot W. Lloyd"
    },
    {
      "name": "Päivi Törmä"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/b3ps7jebmaxjh.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.37142",
  "fulltext_url": null,
  "id": "b3ps7jebmaxjh",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.37142",
  "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"
    ],
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "3107|Strong Light-Matter Interactions"
    ]
  ],
  "openalex": "W7214923268",
  "pdf_url": "https://arxiv.org/pdf/2609.37142",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/b3ps7jebmaxjh.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:31Z",
      "native_id": "2609.37142",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.37142"
    }
  ],
  "subjects": [
    {
      "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:physics.optics",
      "subfield": "optics-photonics"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Second-order coherence properties of ultrafast polariton dynamics in plasmonic lattices",
  "title_text": "Second-order coherence properties of ultrafast polariton dynamics in plasmonic lattices",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:31Z",
  "url": "https://research.draconitic.com/paper/b3ps7jebmaxjh",
  "venue": "arXiv",
  "versions": []
}