{
  "abstract": "We revisit the spin-reduction transition in the random spin-$3/2$ antiferromagnetic Heisenberg chain using the tensor-network strong-disorder renormalization group (tSDRG). The predicted transition separates two random-singlet (RS) phases: one formed by effective spin-$1/2$ moments at weaker disorder and the other by full spin-$3/2$ moments at stronger disorder. Within the Damle--Huse classification, this transition corresponds to an emergent permutation-symmetric $P_4$ multicritical point on a $P_2$ critical line associated with the RS phases. We first derive the critical exponents governing the disorder-averaged bulk and end-to-end correlation functions in the $P_n$ universality classes within the Damle--Huse framework. Using these theoretical predictions, together with a diagnostic constructed from the mean and variance of the energy-gap distribution, we identify the $P_4$ transition point and the reentrant behavior of the RS phase.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.24994",
  "author_total": 3,
  "authors": [
    {
      "name": "Yen-Tung Lin"
    },
    {
      "name": "Pochung Chen"
    },
    {
      "name": "Yu-Cheng Lin"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bfbcwjd6n9s9c.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.24994",
  "fulltext_url": null,
  "id": "bfbcwjd6n9s9c",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.24994",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.dis-nn"
    ],
    [
      "arxiv",
      "cond-mat.str-el"
    ],
    [
      "openalex",
      "3107|Quantum many-body systems"
    ]
  ],
  "openalex": "W7222995956",
  "pdf_url": "https://arxiv.org/pdf/2610.24994",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-24",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bfbcwjd6n9s9c.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:35Z",
      "native_id": "2610.24994",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.24994"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.dis-nn",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Random spin-3/2 antiferromagnetic Heisenberg chains revisited",
  "title_text": "Random spin-3/2 antiferromagnetic Heisenberg chains revisited",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:35Z",
  "url": "https://research.draconitic.com/paper/bfbcwjd6n9s9c",
  "venue": "arXiv",
  "versions": []
}