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TT: Fachverband Tiefe Temperaturen
TT 59: Transport: Poster
TT 59.19: Poster
Wednesday, March 20, 2024, 15:00–18:00, Poster E
Nonlinear Cavity Optomechanics for Enhanced Cooling — •Nicolas Diaz-Naufal1, David Zoepfl2, 3, Lukas Deeg2, 3, Christian M. F. Schneider2, 3, Mathieu L. Juan4, Gerhard Kirchmair2, 3, and Anja Metelmann1,5,6 — 1Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universitaet Berlin, 14195 Berlin, Germany — 2Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences, 6020 Innsbruck, Austria — 3Institute for Experimental Physics, University of Innsbruck, 6020 Innsbruck, Austria — 4Institut Quantique and Departement de Physique, Universite de Sherbrooke, Sherbrooke, Quebec, J1K 2R1, Canada — 5Institute for Quantum Materials and Technology and Institute for Theory of Condensed Matter, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany — 6Institut de Science et de Ingenierie Supramoleculaires (ISIS, UMR7006), University of Strasbourg and CNRS
Cavity optomechanics is fundamental for numerous quantum science and technology applications and recently the use of cavity nonlinearities has attracted a lot of interest. In this study, we show that in a nonlinear optomechanical system, the nonlinearity can be used to enhance the efficiency of backaction cooling of the mechanical mode in the unresolved sideband regime. In addition, we explore the enhancements in the cooling limits achieved when employing a nonlinear optomechanical system, as opposed to an identical linear system, driven by squeezed input light. Furthermore, we demonstrate the validity of this theory above bifurcation, aligning with experimental results.
Keywords: optomechanics; nonlinear cavity; ground-state cooling; bistable