Optical readout of a superconducting qubit through a micromechanical membrane (MCQST-Colloquium) (Prof. Cindy Regal)
- Date: May 16, 2023
- Time: 02:30 PM (Local Time Germany)
- Speaker: Prof. Cindy Regal
- JILA/University of Colorado Boulder, USA
- Location: Max Planck Institute of Quantum Optics
- Room: Herbert Walther Lecture Hall
Entangling microwave-frequency superconducting quantum processors through optical light at ambient temperature would enable means of secure communication and distributed quantum information processing. However, transducing quantum signals between these disparate regimes of the electro-magnetic spectrum remains an outstanding goal, and interfacing superconducting qubits with electro-optic transducers presents considerable challenges owing to the deleterious effects of optical photons in superconducting systems.
I discuss our recent results on readout of a superconducting transmon qubit through a low backaction electro-optomechanical transducer that harness the large spatial scales of a micromechanical membrane. I will discuss concepts that we employ to isolate membrane phonons on mm-scale devices, and recent results elucidating the effect of thermal gradients on membrane mode temperatures.