Conference paper
Feedback cooling of a trampoline in a high-finesse cavity from room temperature
The creation of macroscopic quantum systems represents a long-pursued goal for the quantum-technology community as it might shed new light on the theory of quantum mechanics and find application in quantum information science. Feedback cooling provides an efficient strategy to such objective, as it enables motion control of massive objects coupled to a light field.
Several successful approaches have been developed to achieve cooling into the ground state. The system we present consists of a SiN tethered membrane (trampoline) placed inside an optical cavity with a finesse of 15000. The mechanical motion at 132 kHz is imprinted into the phase of a probing laser beam at 1550 nm and then readout by homodyne detection.
The measurement results are then used to modulate the amplitude of a cooling beam which steers the trampoline towards the ground state via radiation pressure force. Figure 1c shows the results obtained in our feedback cooling scheme, which allowed to reach a final phonon number occupancy of 4000 starting from room temperature.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2021 |
| Pages: | 1-1 |
| Proceedings: | 2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference |
| ISBN: | 1665418761 and 9781665418768 |
| Types: | Conference paper |
| DOI: | 10.1109/CLEO/Europe-EQEC52157.2021.9541742 |
| ORCIDs: | Manetta, Angelo , Hoj, Dennis , Hoff, Ulrich Busk and Andersen, Ulrik Lund |
Cooling Measurement by laser beam Phonons Quantum information science Quantum system SiN SiN tethered membrane Stationary state Temperature measurement cooling beam feedback cooling frequency 132.0 kHz ground state ground states high-finesse cavity homodyne detection laser beam laser cooling light field macroscopic quantum systems massive objects mechanical motion motion control optical cavity phonon number occupancy quantum information science quantum mechanics quantum optics quantum-technology community radiation pressure radiation pressure force room temperature silicon compounds temperature 293.0 K to 298.0 K trampoline wavelength 1550.0 nm
