{
  "abstract": "We investigate wave packets generated by a local pulse electric field in a Tomonaga-Luttinger liquid (TLL) with a U(1) charge $q$. Bosonization shows that a local pulse field creates two counterpropagating packets with opposite accumulated charges $\\pm qK$ and velocity $v$, where $K$ and $v$ are the TLL parameter and velocity. The packet motion produces a linearly growing charge polarization $P(t)=2 qDt$ in the conducting TLL at non-equilibrium, allowing the Drude weight $D=vK$ to be extracted from real-time local dynamics. We test this local-packet description by time-dependent variational principle simulations of the spin-1/2 XXZ chain. The simulations visualize the density, current, energy, and entanglement profiles in the space-time plane and confirm the predicted packet charge and propagation velocity. We also show that excess energy and entanglement remaining near the pulse region are suppressed in the weak-pulse limit. Finally, the Drude weight obtained from the packet-induced polarization agrees with the exact Bethe-ansatz result, demonstrating local-packet spectroscopy of intrinsic transport in a TLL.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.22257",
  "author_total": 2,
  "authors": [
    {
      "name": "Takayuki Yokoyama"
    },
    {
      "name": "Yasuhiro Tada"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4pnragq5cph4z.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.22257",
  "fulltext_url": null,
  "id": "4pnragq5cph4z",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.22257",
  "language": null,
  "licence": "CC0-1.0",
  "licence_label": "CC0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/publicdomain/zero/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mes-hall"
    ],
    [
      "arxiv",
      "cond-mat.str-el"
    ],
    [
      "openalex",
      "3107|Quantum many-body systems"
    ]
  ],
  "openalex": "W7222699620",
  "pdf_url": "https://arxiv.org/pdf/2610.22257",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4pnragq5cph4z.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:50Z",
      "native_id": "2610.22257",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.22257"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Local wave-packet spectroscopy of the Drude weight in Tomonaga-Luttinger liquids",
  "title_text": "Local wave-packet spectroscopy of the Drude weight in Tomonaga-Luttinger liquids",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:50Z",
  "url": "https://research.draconitic.com/paper/4pnragq5cph4z",
  "venue": "arXiv",
  "versions": []
}