{
  "id": "1909.13823",
  "version": "v1",
  "published": "2019-09-30T16:24:22.000Z",
  "updated": "2019-09-30T16:24:22.000Z",
  "title": "Quantum frequency combs and Hong-Ou-Mandel interferometry: the role of spectral phase coherence",
  "authors": [
    "Navin B. Lingaraju",
    "Hsuan-Hao Lu",
    "Suparna Seshadri",
    "Poolad Imany",
    "Daniel E. Leaird",
    "Joseph M. Lukens",
    "Andrew M. Weiner"
  ],
  "comment": "10 pages, 7 figures",
  "categories": [
    "quant-ph",
    "physics.optics"
  ],
  "abstract": "The Hong-Ou-Mandel interferometer is a versatile tool for analyzing the joint properties of photon pairs, relying on a truly quantum interference effect between two-photon probability amplitudes. While the theory behind this form of two-photon interferometry is well established, the development of advanced photon sources and exotic two-photon states has highlighted the importance of quantifying precisely what information can and cannot be inferred from features in a Hong-Ou-Mandel interference trace. Here we examine Hong-Ou-Mandel interference with regard to a particular class of states, so-called quantum frequency combs, and place special emphasis on the role spectral phase plays in these measurements. We find that this form of two-photon interferometry is insensitive to the relative phase between different comb line pairs. This is true even when different comb line pairs are mutually coherent at the input of a Hong-Ou-Mandel interferometer, and the fringe patterns display sharp temporal features. Consequently, Hong-Ou-Mandel interference cannot speak to the presence of high-dimensional frequency-bin entanglement in two-photon quantum frequency combs.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-09-30T16:24:22.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum frequency combs",
      "spectral phase coherence",
      "hong-ou-mandel interferometry",
      "comb line pairs",
      "hong-ou-mandel interference"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}