Feedback cooling of a trampoline in a high-finesse cavity from room temperature

Angelo Manetta, Iman Moaddel Haghighi, Dennis Hoj, Joost van der Heijden, Ulrich Busk Hoff, Ulrik Lund Andersen

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearchpeer-review

Abstract

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.
Original languageEnglish
Title of host publicationProceedings of 2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference
Number of pages1
PublisherIEEE
Publication date2021
DOIs
Publication statusPublished - 2021
Event2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference - Virtual event, Munich, Germany
Duration: 21 Jun 202125 Jun 2021
https://www.cleoeurope.org/

Conference

Conference2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
LocationVirtual event
Country/TerritoryGermany
CityMunich
Period21/06/202125/06/2021
Internet address

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