{
  "annotation_id": "01d686b8-a6f5-49f5-b60e-1f7ac2e2cd17",
  "date_created": "2026-02-17T05:53:08.805000Z",
  "date_modified": "2026-02-17T05:53:08.805000Z",
  "file_hash": "a833bf92b37d2ee93134109d12f51d650a5b0d925ca5940a6fcf5f75de50020a",
  "private": false,
  "record": {
    "abstract": "In many-body quantum systems, interactions drive the emergence of correlations that are at the heart of the most intriguing states of matter. A remarkable example is the case of weakly interacting bosonic systems, whose ground state is a squeezed vacuum state, and whose elementary excitations have a collective nature. In this work, we report on the direct observation of the peculiar microscopic quantum structure of these elementary excitations. We perform time- and frequency-resolved two-photon correlation measurements on the fluctuations of weakly interacting polaritons in a resonantly-driven microcavity, and observe that upon decreasing the average number of fluctuation quanta below unity, large pair correlations build up together with strong time-ordering of the emitted photons. This behavior is a direct signature of the particle-hole quantum superposition which is at the heart of Bogoliubov excitations.",
    "arxiv_id": "2601.06468",
    "authors": [
      "Ferdinand Claude",
      "Yueguang Zhou",
      "Sylvain Ravets",
      "Jacqueline Bloch",
      "Martina Morassi",
      "Aristide Lema\u00eetre",
      "Alberto Bramati",
      "Anna Minguzzi",
      "Iacopo Carusotto",
      "Ir\u00e9n\u00e9e Fr\u00e9rot",
      "Maxime Richard"
    ],
    "categories": [
      "cond-mat.quant-gas",
      "quant-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "title": "Emission of time-ordered photon pairs from a single polaritonic Bogoliubov mode",
    "url": "https://arxiv.org/abs/2601.06468",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a52493da-808f-483e-8a1c-cd883f7b42d7",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}