{
  "id": "1911.08807",
  "version": "v1",
  "published": "2019-11-20T10:34:27.000Z",
  "updated": "2019-11-20T10:34:27.000Z",
  "title": "Three-dimensional entanglement on a silicon chip",
  "authors": [
    "Liangliang Lu",
    "Lijun Xia",
    "Zhiyu Chen",
    "Leizhen Chen",
    "Tonghua Yu",
    "Tao Tao",
    "Wenchao Ma",
    "Ying Pan",
    "Xinlun Cai",
    "Yanqing Lu",
    "Shining Zhu",
    "Xiao-Song Ma"
  ],
  "comment": "23 pages, 14 figures. Presented in `The Nature Conference on Nanophotonics and Integrated Photonics 2018'",
  "categories": [
    "quant-ph",
    "physics.optics"
  ],
  "abstract": "Entanglement is a counterintuitive feature of quantum physics that is at the heart of quantum technology. High-dimensional quantum states offer unique advantages in various quantum information tasks. Integrated photonic chips have recently emerged as a leading platform for the generation, manipulation and detection of entangled photons. Here, we report a silicon photonic chip that uses novel interferometric resonance-enhanced photon-pair sources, spectral demultiplexers and high-dimensional reconfigurable circuitries to generate, manipulate and analyse path-entangled three-dimensional qutrit states. By minimizing on-chip electrical and thermal cross-talk, we obtain high-quality quantum interference with visibilities above 96.5% and a maximumly entangled qutrit state with a fidelity of 95.5%. We further explore the fundamental properties of entangled qutrits to test quantum nonlocality and contextuality, and to implement quantum simulations of graphs and high-precision optical phase measurements. Our work paves the path for the development of multiphoton high-dimensional quantum technologies.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-11-20T10:34:27.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "three-dimensional entanglement",
      "silicon chip",
      "interferometric resonance-enhanced photon-pair sources",
      "path-entangled three-dimensional qutrit states",
      "high-dimensional quantum states offer unique"
    ],
    "tags": [
      "conference paper"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 23,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}