{
  "abstract": "The geometric shadow of a black hole cannot observationally distinguish horizonless exotic compact objects. We break this degeneracy by mapping the fundamental quantum decoherence of the horizon (the Danielson-Satishchandran-Wald mechanism) into a macroscopic effective reflectivity $\\mathcal{R}$. Utilizing Kerr ray tracing, we show that a partially reflective boundary ($\\mathcal{R}>0$) generates delayed electromagnetic echoes under both specular and diffuse (Lambertian) conditions. In the spatial domain, these echoes illuminate the inner shadow and alter low-frequency visibilities, while leaving metric-governed photon subrings unchanged. The signal strength scales with the membrane compactness $ε$ as $ε^Γ$, where $Γ=0$ for specular reflection and $Γ\\to1$ for diffuse re-emission due to escape-cone collapse. This brings specular reflectivities down to $\\mathcal{R}\\simeq0.12$ (ngEHT) and $0.04$ (BHEX) within reach of static imaging. For Sagittarius A$^\\ast$, we translate these echoes into a robust time-domain signature. Using an Autocorrelation Function (ACF) pipeline, we demonstrate that single-flare echoes can be cleanly extracted from severe accretion red noise, achieving a $3σ$ detection for amplitudes $\\mathcal{A}\\gtrsim0.3$ within 15 to 33 hours of continuous monitoring. This framework provides a directly deployable pathway to test black hole unitarity.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.03762",
  "author_total": 5,
  "authors": [
    {
      "name": "Sen Guo"
    },
    {
      "name": "Xin Li"
    },
    {
      "name": "Yu Liang"
    },
    {
      "name": "Kai Lin"
    },
    {
      "name": "Li-Fang Li"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/571hm5bry24yc.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.03762",
  "fulltext_url": null,
  "id": "571hm5bry24yc",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.03762",
  "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",
      "gr-qc"
    ],
    [
      "arxiv",
      "hep-th"
    ],
    [
      "openalex",
      "3103|Astrophysical Phenomena and Observations"
    ]
  ],
  "openalex": "W7220732403",
  "pdf_url": "https://arxiv.org/pdf/2610.03762",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/571hm5bry24yc.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:01Z",
      "native_id": "2610.03762",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.03762"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "Influence of quantum decoherence on black hole shadow visibility and time domain echoes",
  "title_text": "Influence of quantum decoherence on black hole shadow visibility and time domain echoes",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:01Z",
  "url": "https://research.draconitic.com/paper/571hm5bry24yc",
  "venue": "arXiv",
  "versions": []
}