{
  "abstract": "Within the scattering matrix ($S$-matrix) framework adapted to the high-frequency Floquet--Magnus formalism based on the length gauge, we investigate spin-dependent quantum transport in a 1D quantum ring with an asymmetric ($π/2$) configuration of quantum point contacts. We demonstrate the realization of a contactless electromagnetic analog of the Datta--Das spin field-effect transistor with ferromagnetic leads operating at zero static magnetic field. It is shown that an off-resonance terahertz (THz) field enables high-precision switching between spin channels without altering the static parameters of the nanostructure. Driven by an electronic Vernier effect, the quantum interference in the asymmetric geometry yields a selective spin phase rotator alongside an ultra-high-contrast current-suppression regime (``optical shutter''). The proposed architecture is fundamentally robust against multiphoton leakage sidebands, offering a thermally immune, high-speed alternative to conventional semiconductor static spin transistors.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.19897",
  "author_total": 1,
  "authors": [
    {
      "name": "R. G. Nazmitdinov"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/esatf329ekr1g.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.19897",
  "fulltext_url": null,
  "id": "esatf329ekr1g",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.19897",
  "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.mes-hall"
    ],
    [
      "openalex",
      "3107|Quantum and electron transport phenomena"
    ]
  ],
  "openalex": "W7170199677",
  "pdf_url": "https://arxiv.org/pdf/2607.19897",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-26",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/esatf329ekr1g.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:35Z",
      "native_id": "2607.19897",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.19897"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "THz-Driven Floquet Spin Valve-Modulator",
  "title_text": "THz-Driven Floquet Spin Valve-Modulator",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:35Z",
  "url": "https://research.draconitic.com/paper/esatf329ekr1g",
  "venue": "arXiv",
  "versions": []
}