{
"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"
}
}
}