{
  "abstract": "In a thermally occupied multimode trapped ensemble, mode-dependent detunings can strongly suppress Ramsey contrast even when the underlying dynamics remains coherent. We develop a weak-axis-resolved Hamiltonian theory in which collective mode spins experience longitudinal detunings and overlap-dependent exchange interactions. Without exchange, the distribution of detunings across thermally occupied modes produces coherent phase mixing and an algebraically decaying Ramsey-contrast envelope in the many-mode continuum regime. At the mean-field level, exchange generates a self-consistent restoring field that reduces phase dispersion and restores collective contrast. The crossover is governed by the competition between the collective exchange scale and the thermally induced detuning spread: when the late-time contrast is expressed in terms of their ratio, results at different temperatures collapse onto a common trend, and the crossover coupling follows the predicted inverse-square thermal scaling, with a numerical exponent of 2.06. Weak irreversible pure dephasing limits, but does not eliminate, this recovery, demonstrating that exchange refocuses coherent inhomogeneous phase mixing but cannot reverse irreversible phase noise.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.09073",
  "author_total": 2,
  "authors": [
    {
      "name": "Aleksandre Merabishvili"
    },
    {
      "name": "Ebubechukwu O. Ilo-Okeke"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3e1ahvyt6qg4s.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.09073",
  "fulltext_url": null,
  "id": "3e1ahvyt6qg4s",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.09073",
  "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",
      "quant-ph"
    ],
    [
      "openalex",
      "3107|Cold Atom Physics and Bose-Einstein Condensates"
    ]
  ],
  "openalex": "W7221004584",
  "pdf_url": "https://arxiv.org/pdf/2610.09073",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-06",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3e1ahvyt6qg4s.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:37Z",
      "native_id": "2610.09073",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.09073"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Interaction-Assisted Spin Coherence in a Multimode Trapped Atomic Ensemble",
  "title_text": "Interaction-Assisted Spin Coherence in a Multimode Trapped Atomic Ensemble",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:37Z",
  "url": "https://research.draconitic.com/paper/3e1ahvyt6qg4s",
  "venue": "arXiv",
  "versions": []
}