{
  "abstract": "The phase coherence of primordial perturbations shapes the acoustic peaks of the CMB and is regarded as a key signature of inflation. Inflationary scenarios at different energy scales, thus with different durations, are commonly expected to leave different levels of coherence. We show this expectation fails: because the curvature perturbation is conserved on super-Hubble scales, the coherence at recombination inherits a value fixed by the observed primordial spectrum alone. This holds irrespective of the inflationary energy scale and the subsequent expansion history.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.03012",
  "author_total": 5,
  "authors": [
    {
      "name": "Siméon Vareilles"
    },
    {
      "name": "Thomas Colas"
    },
    {
      "name": "Julien Grain"
    },
    {
      "name": "Federico Piazza"
    },
    {
      "name": "Vincent Vennin"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/errs760qedqmt.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.03012",
  "fulltext_url": null,
  "id": "errs760qedqmt",
  "issns": [],
  "landing_url": "https://hal.science/hal-05742735v1",
  "language": "en",
  "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",
      "astro-ph.CO"
    ],
    [
      "arxiv",
      "gr-qc"
    ],
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      "arxiv",
      "hep-th"
    ],
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      "hal",
      "0.phys"
    ],
    [
      "hal",
      "1.phys.astr"
    ],
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      "hal",
      "1.phys.grqc"
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      "hal",
      "1.phys.hthe"
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  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.03012",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-02",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/errs760qedqmt.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:31Z",
      "native_id": "hal-05742735",
      "source": "hal",
      "url": "https://hal.science/hal-05742735v1"
    },
    {
      "first_seen": "2026-10-30T12:18:31Z",
      "native_id": "2609.03012",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.03012"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "Universal CMB Phase Coherence from Single-Field Inflation",
  "title_text": "Universal CMB Phase Coherence from Single-Field Inflation",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:31Z",
  "url": "https://research.draconitic.com/paper/errs760qedqmt",
  "venue": "HAL",
  "versions": []
}