{
  "abstract": "Quantum memory is a core enabling device for large-scale quantum networks, serving as the fundamental building block for quantum repeaters and transportable quantum memories. Among various physical platforms, rare-earth-ion-doped crystals stand out as one of the most promising solid-state candidates for long-lived photonic quantum memories, owing to their exceptionally long spin coherence time and their compatibility with integration. In this review, we first introduce the physical mechanisms underlying long-lived spin coherence in rare-earth systems, with particular emphasis on the zero-first-order-Zeeman transition and dynamical decoupling techniques. We then review the experimental progress in this field, highlighting three distinct lifetimes--the spin coherence time, the light storage time, and the quantum storage time--and covering experiments that have achieved hour-scale spin coherence, minute- to hour-scale light storage, and minute-scale single-photon-level quantum storage. Finally, we discuss the remaining challenges that hinder the realization of practical long-lived quantum memories, explore potential strategies to overcome these obstacles, and outline the prospects for their future applications in quantum networks.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Quantum Frontiers 5, 14 (2026)",
  "arxiv": "2611.04526",
  "author_total": 4,
  "authors": [
    {
      "name": "Yu-Yu Sa"
    },
    {
      "name": "Pei-Xi Liu"
    },
    {
      "name": "Zong-Quan Zhou"
    },
    {
      "name": "Chuan-Feng Li"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fnwytwvhxaxqq.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.04526",
  "fulltext_url": null,
  "id": "fnwytwvhxaxqq",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.04526",
  "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",
      "quant-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.04526",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-03",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/fnwytwvhxaxqq.ris",
  "sources": [
    {
      "first_seen": "2026-11-04T15:21:25Z",
      "native_id": "2611.04526",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.04526"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Long-lived quantum memories with rare-earth ions doped in crystals",
  "title_text": "Long-lived quantum memories with rare-earth ions doped in crystals",
  "type": "preprint",
  "updated_at": "2026-11-06T18:21:01Z",
  "url": "https://research.draconitic.com/paper/fnwytwvhxaxqq",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1007/s44214-026-00110-1",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}