{
  "abstract": "In this work, we present a numerical and experimental investigation of the collective early-time decay rates of an optically dense cold atomic cloud supporting a large number of excitations. We prepare the atomic ensemble by driving the system to its steady state with varying Rabi frequencies Ω that go from the low excitation Ω ≪ Γ to the multiple excitation regime Ω ≫ Γ , where Γ is the single-atom decay rate. We investigate the early-time dynamics in the transition between the strong and weak driving regimes using (1) angular-dependent observables, such as the light emitted by the cloud, and (2) global observables, i.e., the excited-state population. When driving the cloud on resonance, we find that as a function of the driving frequency, the behavior of the collected light at certain angles transitions from the single-photon subradiant regime to a superradiant regime, while the behavior of the excited-state population does not show superradiance. The experiment shows good agreement with numerical predictions at the chosen angle of observation in the regime of parameters under study.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "name": "Daniel Benedicto Orenes"
    },
    {
      "name": "Naudson Lucas Lopes Matias"
    },
    {
      "name": "Apoorva Apoorva"
    },
    {
      "name": "Antoine Glicenstein"
    },
    {
      "name": "Raphaël Saint-Jalm"
    },
    {
      "name": "Robin Kaiser"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6hjzfyr73qh22.bib",
  "cited_by": 0,
  "doi": "10.1103/kqr8-h1m5",
  "fulltext_url": null,
  "id": "6hjzfyr73qh22",
  "issns": [
    "2643-1564",
    "2643-1564"
  ],
  "landing_url": "https://hal.science/hal-05760592v1",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.phys"
    ],
    [
      "hal",
      "1.phys.qphy"
    ],
    [
      "openalex",
      "3107|Quantum optics and atomic interactions"
    ]
  ],
  "openalex": "W4416667713",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-18",
  "publisher": "American Physical Society",
  "ris": "https://research.draconitic.com/paper/6hjzfyr73qh22.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:39Z",
      "native_id": "hal-05760592",
      "source": "hal",
      "url": "https://hal.science/hal-05760592v1"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "hal:1.phys.qphy",
      "subfield": "quantum"
    }
  ],
  "title": "Collective early-time spontaneous decay of a cold atomic ensemble from the single to multiple excitation regime",
  "title_text": "Collective early-time spontaneous decay of a cold atomic ensemble from the single to multiple excitation regime",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:39Z",
  "url": "https://research.draconitic.com/paper/6hjzfyr73qh22",
  "venue": "Physical Review Research",
  "versions": []
}