{
  "abstract": "Twisted cuprate bilayers have been proposed to host chiral superconductivity at temperatures comparable to their large pairing scale, yet experimental signatures of broken time-reversal symmetry remain unclear. We show that quantum phase fluctuations strongly suppress chiral order in twisted overdoped cuprate bilayers despite robust intralayer pairing. At a $45^\\circ$ twist, we analytically demonstrate that the chiral transition temperature obeys $T_χ\\propto t^4$ when the single-electron interlayer tunneling amplitude $t$ is weak. This collapse originates from competition between the small Josephson energy scale supporting chirality and the temperature-dependent collective zero-point energy. Chirality consequently survives only in a narrow angular window at ultralow temperatures, with relative-phase plasma softening above the chiral transition. A distinct transport signature arising from the quantum phase fluctuations is a pronounced low-temperature enhancement of the critical current near a magic angle. These findings separate pairing and chiral ordering scales and offer a possible explanation for the difficulty of observing robust chiral superconductivity in twisted cuprates.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.00630",
  "author_total": 5,
  "authors": [
    {
      "name": "Yin Shi"
    },
    {
      "name": "Mengxian Zhao"
    },
    {
      "name": "Fei Yang"
    },
    {
      "name": "Miao Liu"
    },
    {
      "name": "Sheng Meng"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4sg2j16sfkb6r.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.00630",
  "fulltext_url": null,
  "id": "4sg2j16sfkb6r",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.00630",
  "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",
      "cond-mat.supr-con"
    ],
    [
      "openalex",
      "3104|Physics of Superconductivity and Magnetism"
    ]
  ],
  "openalex": "W7167018649",
  "pdf_url": "https://arxiv.org/pdf/2607.00630",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-31",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4sg2j16sfkb6r.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T12:20:58Z",
      "native_id": "2607.00630",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.00630"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.supr-con",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Quantum phase fluctuations quench chiral superconductivity in twisted overdoped cuprate bilayers",
  "title_text": "Quantum phase fluctuations quench chiral superconductivity in twisted overdoped cuprate bilayers",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:17Z",
  "url": "https://research.draconitic.com/paper/4sg2j16sfkb6r",
  "venue": "arXiv",
  "versions": []
}