{
  "id": "2309.06765",
  "version": "v1",
  "published": "2023-09-13T07:33:09.000Z",
  "updated": "2023-09-13T07:33:09.000Z",
  "title": "Strong backaction on a mechanical resonator by a few photons",
  "authors": [
    "Tanmoy bera",
    "Vibhor Singh"
  ],
  "comment": "Total 9 figures; 13 pages",
  "categories": [
    "quant-ph",
    "cond-mat.mes-hall"
  ],
  "abstract": "Cavity electromechanical systems, consisting of a mechanical resonator coupled to an electromagnetic mode, are extensively used for sensing of various forces and controlling the vibrations of a mechanical mode down to their quantum limit. In the microwave domain, such devices based on magnetic-flux coupling have emerged as a promising platform with the potential to reach a single-photon strong coupling regime. Here, we demonstrate a flux-coupled electromechanical device using a frequency tunable superconducting transmon qubit, and a microwave cavity. By tuning the qubit in resonance with the cavity, the hybridized state (dressed mode) of the qubit and the cavity mode is used to achieve a magnetic field-dependent electromechanical coupling. It is established by performing an electromagnetically-induced transparency (EIT)-like experiment. At the largest applied field, we estimate the single-photon coupling rate of 60 kHz. Further, in the presence of the pump signal, we observe backaction, showing both cooling and heating of the mechanical mode. With a stronger pump, the dressed mode shows the signature of \"super-splitting\", and a strong backaction on the mechanical resonator, reflected in the broadening of the mechanical linewidth by a factor of 42 while using less than 1 photon in the dressed mode.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-09-13T07:33:09.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "mechanical resonator",
      "strong backaction",
      "dressed mode",
      "mechanical mode",
      "frequency tunable superconducting transmon qubit"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}