{
  "abstract": "Long-range interactions in many-body quantum systems give rise to a wide range of dynamical phenomena, from collective dynamics well described by integrable mean-field models with symmetric all-to-all couplings, to fast scrambling of quantum information from disordered long-range interactions. Here, we investigate scenarios in which both regimes emerge within a single deterministic, translation-invariant XY spin model with long-range couplings. We consider a sparse powers-of-two (PWR2) graph, where each spin interacts with a logarithmic number of neighbors, and a power-law-decaying model. By altering the initial state via local perturbations on a completely symmetric state, we show that the dynamics changes from collective to scrambling as witnessed by bipartite and multipartite entanglement measures. We characterize this collective-to-scrambling crossover using Lyapunov exponents in the semiclassical regime, and show that the spectral properties of the coupling graph adjacency matrix provide a very efficient tool to predict the onset of fast scrambling. Our results offer a unified framework for controlling the switch between collective and scrambling dynamics in a setup accessible in experiments with neutral atoms in cavities or in tweezer arrays.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.28462",
  "author_total": 4,
  "authors": [
    {
      "name": "Sridevi Kuriyattil"
    },
    {
      "name": "Johannes Kombe"
    },
    {
      "name": "Andrew J. Daley"
    },
    {
      "name": "Pablo M. Poggi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fxcavga7w1nnd.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.28462",
  "fulltext_url": null,
  "id": "fxcavga7w1nnd",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.28462",
  "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|Quantum many-body systems"
    ]
  ],
  "openalex": "W7223131398",
  "pdf_url": "https://arxiv.org/pdf/2610.28462",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-20",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/fxcavga7w1nnd.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:04Z",
      "native_id": "2610.28462",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.28462"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Tuning between collective dynamics and scrambling through initial-state symmetry alignment in long-range spin models",
  "title_text": "Tuning between collective dynamics and scrambling through initial-state symmetry alignment in long-range spin models",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:04Z",
  "url": "https://research.draconitic.com/paper/fxcavga7w1nnd",
  "venue": "arXiv",
  "versions": []
}