{
  "abstract": "We study a chiral giant atom ultrastrongly coupled to a one-dimensional waveguide at two spatially separated points. At a relative coupling phase π/2, the total spectral density is independent of the distance between the coupling points, whereas its directional components are not. Using a variational polaron transformation, we show that the renormalized transition frequency and the total ground-state dressing inherit this independence, while the virtual-photon cloud remains chiral. A sudden switch-off of the coupling releases this cloud as directional radiation. We also derive the spontaneous-emission dynamics in the polaron frame, showing that, after neglecting the local photonic potential, the memory kernel becomes distance independent at the same phase.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.07036",
  "author_total": 4,
  "authors": [
    {
      "name": "Giuseppe Musolino"
    },
    {
      "name": "Daniele Lamberto"
    },
    {
      "name": "Salvatore Savasta"
    },
    {
      "name": "Federico Roccati"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/b4m5tbp2qck3p.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.07036",
  "fulltext_url": null,
  "id": "b4m5tbp2qck3p",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.07036",
  "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"
    ],
    [
      "arxiv",
      "quant-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.07036",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-04",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/b4m5tbp2qck3p.ris",
  "sources": [
    {
      "first_seen": "2026-11-06T18:21:30Z",
      "native_id": "2611.07036",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.07036"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Ground-State Dressing and Delayed Feedback of a Chiral Giant Atom in Ultrastrong Waveguide QED",
  "title_text": "Ground-State Dressing and Delayed Feedback of a Chiral Giant Atom in Ultrastrong Waveguide QED",
  "type": "preprint",
  "updated_at": "2026-11-09T00:20:40Z",
  "url": "https://research.draconitic.com/paper/b4m5tbp2qck3p",
  "venue": "arXiv",
  "versions": []
}