{
  "id": "1908.04765",
  "version": "v1",
  "published": "2019-08-13T17:26:45.000Z",
  "updated": "2019-08-13T17:26:45.000Z",
  "title": "Tuning between photon-number and quadrature measurements with weak-field homodyne detection",
  "authors": [
    "G. S. Thekkadath",
    "D. S. Phillips",
    "J. F. F. Bulmer",
    "W. R. Clements",
    "A. Eckstein",
    "B. A. Bell",
    "J. Lugani",
    "T. A. W. Wolterink",
    "A. Lita",
    "S. W. Nam",
    "T. Gerrits",
    "C. G. Wade",
    "I. A. Walmsley"
  ],
  "comment": "12 pages, 10 figures; includes Supplemental Material",
  "categories": [
    "quant-ph"
  ],
  "abstract": "Variable measurement operators enable the optimization of strategies for testing quantum properties and the preparation of a range of quantum states. Here, we experimentally implement a weak-field homodyne detector that can continuously tune between performing a photon-number measurement and a field quadrature measurement on a quantum state $\\hat{\\rho}$. We combine $\\hat{\\rho}$ with a coherent state $|\\alpha\\rangle$ on a balanced beam splitter, and detect light at both output ports using photon-number-resolving transition edge sensors. We observe that the discrete difference statistics converge to the quadrature distribution of $\\hat{\\rho}$ as we increase $|\\alpha|$. Moreover, in a proof-of-principle demonstration of state engineering, we show the ability to control the photon-number distribution of a state that is heralded using our weak-field homodyne detector.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2019-08-13T17:26:45.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "weak-field homodyne detection",
      "weak-field homodyne detector",
      "discrete difference statistics converge",
      "quantum state",
      "photon-number-resolving transition edge sensors"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}