{
  "abstract": "We present an optical random access memory (ORAM) based on warm cesium (Cs) atomic vapor and demonstrate its operation as the physical substrate of a reservoir computer. Information is stored in the hyperfine population distribution of a Cs ensemble via optical pumping and retrieved through differential probe absorption. Spatial multiplexing via acousto-optic deflection provides eight addressable memory rails able to store up to 3.9 bits of information per rail. Employing this platform as a temporally multiplexed reservoir, we achieve a kernel rank (KR =8.8 ± 0.4), and a minimum bit error rate of 0.02 ± 0.01 on the Exclusive-or (XOR) benchmark. We find the limited memory lifetime constrains the achievable temporal depth, encouraging further research into fast addressable memories. This constitutes the first demonstration of a free-space, optically writable atomic RAM as a substrate in an optical reservoir computing system.",
  "abstract_shown": true,
  "affiliations": [
    "Institute of Physics, Technische Universität Berlin",
    "Technical University of Berlin",
    "Institut für Physik, Technische Universität Illmenau",
    "Einstein Center Digital Future (ECDF)",
    "AQLS UG Haftungsbeschränkt"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Elizabeth Robertson",
      "orcid": "0000-0003-0856-5893"
    },
    {
      "affs": [
        0
      ],
      "name": "Mingwei Yang"
    },
    {
      "affs": [
        2
      ],
      "name": "Lina Jaurigue",
      "orcid": "0000-0002-5104-7111"
    },
    {
      "affs": [
        1,
        3
      ],
      "name": "Guillermo Gallego"
    },
    {
      "affs": [
        2
      ],
      "name": "Kathy Lüdge",
      "orcid": "0000-0002-4831-8910"
    },
    {
      "affs": [
        0,
        3,
        4
      ],
      "name": "Janik Wolters"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bg1f46c21k18h.bib",
  "cited_by": 0,
  "doi": "10.1364/oe.612547",
  "fulltext_url": null,
  "id": "bg1f46c21k18h",
  "issns": [
    "1094-4087"
  ],
  "landing_url": "https://opg.optica.org/abstract.cfm?URI=oe-34-21-39389",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "1702|Neural Networks and Reservoir Computing"
    ]
  ],
  "openalex": "W7203798089",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-09",
  "publisher": "Optica Publishing Group",
  "ris": "https://research.draconitic.com/paper/bg1f46c21k18h.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:09Z",
      "native_id": "10.1364/oe.612547",
      "source": "crossref",
      "url": "https://opg.optica.org/abstract.cfm?URI=oe-34-21-39389"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "issn:1094-4087",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Optically writable atomic vapor memory as a substrate for optical reservoir computing",
  "title_text": "Optically writable atomic vapor memory as a substrate for optical reservoir computing",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:09Z",
  "url": "https://research.draconitic.com/paper/bg1f46c21k18h",
  "venue": "Optics Express",
  "versions": []
}