{
  "abstract": "In this paper we analyze the performance of photonic CZ gates based on N waveguide-coupled cavities containing two-level emitters. We derive single- and two-photon scattering matrices for one cavity using the input-output formalism of quantum optics and for N>1 cavities using the SLH formalism, allowing us to compute the CZ gate fidelity. We consider two input Gaussian wave packets that are centered on a two-photon transition of the emitter-cavity system, and find a trade-off between optimizing the single-photon and two-photon wave packet shape. While the single-photon wave packet is preserved for large emitter-cavity coupling rates, where there is little overlap with the single-photon transitions, the two-photon wave packet acquires the necessary $π$ phase shift for smaller coupling rates, comparable to the cavity decay rate multiplied by the number of cavities. We find that this trade-off limits the CZ gate fidelity to approximately 60% when averaging over all input states.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.26429",
  "author_total": 2,
  "authors": [
    {
      "name": "Mateusz Duda"
    },
    {
      "name": "Pieter Kok"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/ejv7y9x7wxmzv.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.26429",
  "fulltext_url": null,
  "id": "ejv7y9x7wxmzv",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.26429",
  "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",
      "1702|Quantum Information and Cryptography"
    ]
  ],
  "openalex": "W7214118587",
  "pdf_url": "https://arxiv.org/pdf/2609.26429",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/ejv7y9x7wxmzv.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:39Z",
      "native_id": "2609.26429",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.26429"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Photonic CZ gates based on few-photon scattering from emitter-cavity systems",
  "title_text": "Photonic CZ gates based on few-photon scattering from emitter-cavity systems",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:39Z",
  "url": "https://research.draconitic.com/paper/ejv7y9x7wxmzv",
  "venue": "arXiv",
  "versions": []
}