{
  "abstract": "Quantum entanglement is intrinsically nonlocal, whereas tunneling spectroscopy measures one site at a time. We show that this apparent mismatch can be overcome: local tunneling spectra can certify spin entanglement without coherent control or absolute intensity calibration. An exact spin sum rule turns the high-bias conductance into an internal normalization, allowing the inelastic spin-flip weight to place a lower bound on the local quantum Fisher information. Total-spin conservation then fixes the otherwise inaccessible intersite fluctuation, converting two local spectra into a bound on a collective entanglement witness. We incorporate coupling to the substrate through a spectroscopic bound on spin leakage, while a hierarchy of thresholds distinguishes entanglement between the spins from entanglement with their environment. Including instrumental broadening and noise, the resulting certificate holds at a stated confidence level. These results establish a route for extracting nonlocal quantum information from equilibrium local spectroscopy.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.24440",
  "author_total": 7,
  "authors": [
    {
      "name": "Payman Kazemikhah"
    },
    {
      "name": "Ruolun Zhang"
    },
    {
      "name": "Xiangyu Luo"
    },
    {
      "name": "Byunghoon Kim"
    },
    {
      "name": "Yu-Peng Zhu"
    },
    {
      "name": "Md. Shafayat Hossain"
    },
    {
      "name": "M. Zahid Hasan"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dj1gwg8rhm31k.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.24440",
  "fulltext_url": null,
  "id": "dj1gwg8rhm31k",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.24440",
  "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.str-el"
    ],
    [
      "arxiv",
      "physics.app-ph"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "3107|Quantum and electron transport phenomena"
    ]
  ],
  "openalex": "W7223025904",
  "pdf_url": "https://arxiv.org/pdf/2610.24440",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-17",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dj1gwg8rhm31k.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:52Z",
      "native_id": "2610.24440",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.24440"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.app-ph",
      "subfield": "applied-instrumentation"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.str-el",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Certifying Nonlocal Spin Quantum Entanglement from Local Tunneling Spectra",
  "title_text": "Certifying Nonlocal Spin Quantum Entanglement from Local Tunneling Spectra",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:41Z",
  "url": "https://research.draconitic.com/paper/dj1gwg8rhm31k",
  "venue": "arXiv",
  "versions": []
}