{
  "abstract": "Post-selected metrology can exceed the standard quantum limit of single photon interference by concentrating all of the available Fisher information in a subset of post-selected outcomes. Here we apply this principle to a standard two-path interferometer, activating the Fisher information concentrated in the low probability output port by transferring the phase sensitivity to the circular polarizations of the photon. We obtain a phase gradient of the post-selected interference fringe that corresponds to that of a four-photon NOON state, providing a direct comparison of the performance of multi-photon interference with single-photon post-selection.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.25673",
  "author_total": 4,
  "authors": [
    {
      "name": "Ryuya Fukuda"
    },
    {
      "name": "Katsuki Tanaka"
    },
    {
      "name": "Masataka Iinuma"
    },
    {
      "name": "Holger F. Hofmann"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/b7ga57e3ac77d.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.25673",
  "fulltext_url": null,
  "id": "b7ga57e3ac77d",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.25673",
  "language": null,
  "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",
      "physics.optics"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "1702|Quantum Information and Cryptography"
    ]
  ],
  "openalex": "W7214084143",
  "pdf_url": "https://arxiv.org/pdf/2609.25673",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/b7ga57e3ac77d.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:39Z",
      "native_id": "2609.25673",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.25673"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Post-selected enhancement of phase sensitivity in a two-path interferometer",
  "title_text": "Post-selected enhancement of phase sensitivity in a two-path interferometer",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:39Z",
  "url": "https://research.draconitic.com/paper/b7ga57e3ac77d",
  "venue": "arXiv",
  "versions": []
}