{
  "id": "1812.03360",
  "version": "v1",
  "published": "2018-12-08T18:06:42.000Z",
  "updated": "2018-12-08T18:06:42.000Z",
  "title": "Quantum interference and exceptional points",
  "authors": [
    "Stefano Longhi"
  ],
  "comment": "5 figures",
  "journal": "Optics Letters 43, 5371 (2018)",
  "doi": "10.1364/OL.43.005371",
  "categories": [
    "quant-ph",
    "physics.optics"
  ],
  "abstract": "Exceptional points (EPs), i.e. branch point singularities of non-Hermitian Hamiltonians, are ubiquitous in optics. So far, the signatures of EPs have been mostly studied assuming classical light. In the passive parity-time ($\\mathcal{PT}$) optical coupler, a fingerprint of EPs resulting from the coalescence of two resonance modes is a qualitative change of the photon decay law, from damped Rabi-like oscillations to transparency, as the EP is crossed by increasing the loss rate. However, when probed by non-classical states of light, quantum interference can hide EPs. Here it is shown that, under excitation with polarization-entangled two-photon states, EP phase transition is smoothed until to disappear as the effective particle statistics is changed from bosonic to fermionic.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-12-08T18:06:42.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "exceptional points",
      "quantum interference",
      "branch point singularities",
      "ep phase transition",
      "photon decay law"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}