{
  "abstract": "The unique underground location of the Einstein Telescope (ET) is expected to substantially suppress seismic and gravity-gradient noise, providing a favorable environment for gravitational-wave detection at low frequencies compared with surface-based observatories. The baseline ET design aims to achieve broadband sensitivity through a xylophone configuration, in which separate cryogenic and room-temperature interferometers are optimised for low- and high-frequency gravitational-wave detection. However, achieving the target low-frequency sensitivity introduces substantial technical complexity caused by vertical suspension thermal noise, vibrations of the cryocooler, and detuned optical configuration. In this paper, we demonstrate an alternative, entirely room-temperature, fully resonant, single-interferometer architecture that addresses these challenges and achieves broadband sensitivity superior to that of the conventional ET xylophone configuration. Using mature fused-silica suspension technology, recent advances in optical coatings, and novel inertial isolation, we show that 4-m-long fused-silica fibres can meet the required suspension thermal-noise performance. We further demonstrate that vibrations, optical rigidity, and quantum back-action noise can be controlled through appropriate design of the interferometer, test mass suspensions, optical seismometers, and quantum states.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.29863",
  "author_total": 24,
  "authors": [
    {
      "name": "Teng Zhang"
    },
    {
      "name": "Amit Singh Ubhi"
    },
    {
      "name": "Huan Yang"
    },
    {
      "name": "Alan V. Cumming"
    },
    {
      "name": "Mark Barton"
    },
    {
      "name": "Angus Bell"
    },
    {
      "name": "Fabio Bergamin"
    },
    {
      "name": "Giacomo Bruno"
    },
    {
      "name": "Katherine L. Dooley"
    },
    {
      "name": "Johannes Eichholz"
    },
    {
      "name": "Mariana Fazio"
    },
    {
      "name": "Aaron Goodwin-Jones"
    },
    {
      "name": "James Hough"
    },
    {
      "name": "Keiko Kokeyama"
    },
    {
      "name": "Haixing Miao"
    },
    {
      "name": "Xingrui Peng"
    },
    {
      "name": "Geraint Pratten"
    },
    {
      "name": "Stuart Reid"
    },
    {
      "name": "Sheila Rowan"
    },
    {
      "name": "Patricia Schmidt"
    },
    {
      "name": "Alberto Vecchio"
    },
    {
      "name": "Giles Hammond"
    },
    {
      "name": "Hartmut Grote"
    },
    {
      "name": "Denis Martynov"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7h6n8zj96cz2y.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.29863",
  "fulltext_url": null,
  "id": "7h6n8zj96cz2y",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.29863",
  "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",
      "astro-ph.IM"
    ],
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "arxiv",
      "physics.ins-det"
    ],
    [
      "openalex",
      "3103|Pulsars and Gravitational Waves Research"
    ]
  ],
  "openalex": "W7223247688",
  "pdf_url": "https://arxiv.org/pdf/2610.29863",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-21",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7h6n8zj96cz2y.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:19Z",
      "native_id": "2610.29863",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.29863"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.IM",
      "subfield": "instrumentation-methods"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.ins-det",
      "subfield": "applied-instrumentation"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "A Broadband Room-Temperature Design for the Einstein Telescope",
  "title_text": "A Broadband Room-Temperature Design for the Einstein Telescope",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:19Z",
  "url": "https://research.draconitic.com/paper/7h6n8zj96cz2y",
  "venue": "arXiv",
  "versions": []
}