{
  "abstract": "We derive thermodynamic speed limits for isolated quantum systems undergoing finite-time unitary driving. The key ingredient is a set of generalized second-law inequalities: for the Gibbs entropy and for several thermodynamically motivated observational entropies, the entropy production is bounded from below by a function of the Vu--Saito quantum Wasserstein distance between the initial and final coarse-grained states. These inequalities yield lower bounds on the operation time in terms of the average entropy-production rate. We apply the framework to system--bath coarse-graining, local-energy coarse-graining, and diagonal entropy, and illustrate the resulting bounds with numerical and analytically solvable examples. Our results provide a thermodynamic characterization of finite-time state transformations in isolated quantum systems and clarify how coarse-grained entropy production constrains macroscopic reachability.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.12520",
  "author_total": 1,
  "authors": [
    {
      "name": "Rikuya Kobashi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1wnd0pvmmd404.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.12520",
  "fulltext_url": null,
  "id": "1wnd0pvmmd404",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.12520",
  "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.stat-mech"
    ],
    [
      "openalex",
      "3109|Advanced Thermodynamics and Statistical Mechanics"
    ]
  ],
  "openalex": "W7213068651",
  "pdf_url": "https://arxiv.org/pdf/2609.12520",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-11",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1wnd0pvmmd404.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:07Z",
      "native_id": "2609.12520",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.12520"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.stat-mech",
      "subfield": "statistical-nonlinear"
    }
  ],
  "title": "Thermodynamic Speed Limits in Isolated Quantum Systems",
  "title_text": "Thermodynamic Speed Limits in Isolated Quantum Systems",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:07Z",
  "url": "https://research.draconitic.com/paper/1wnd0pvmmd404",
  "venue": "arXiv",
  "versions": []
}