Abstract
Dynamical backaction resulting from radiation pressure forces in optomechanical systems has proven to be a versatile tool for manipulating mechanical vibrations. Notably, dynamical backaction has resulted in the cooling of a mechanical resonator to its ground-state, driving phonon lasing, the generation of entangled states, and observation of the optical-spring effect. In certain magnetic materials, mechanical vibrations can interact with magnetic excitations (magnons) via the magnetostrictive interaction, resulting in an analogous magnon-induced dynamical backaction. In this article, we directly observe the impact of magnon-induced dynamical backaction on a spherical magnetic sample's mechanical vibrations. Moreover, dynamical backaction effects play a crucial role in many recent theoretical proposals; thus, our work provides the foundation for future experimental work pursuing many of these theoretical proposals.
Highlights
Hybrid cavity systems hold great promise for exploring a wide variety of physical phenomena
Dynamical backaction effects play a crucial role in many recent theoretical proposals; our work provides the foundation for future experimental work pursuing many of these theoretical proposals
The magnomechanical interaction has in recent years been the focus of considerable theoretical work, yet experimental progress has been surprisingly limited
Summary
Hybrid cavity systems hold great promise for exploring a wide variety of physical phenomena. The coupling of electromagnetic cavities with magnonic systems has generated significant interest [2,3,4], with theoretical proposals for magnetometry [5] and axion detection [6,7,8], and experiments demonstrating strong coupling [9,10,11,12,13], magnon Fock state detection [14,15], coupling to superconducting qubits [16,17], bidirectional microwave to optical conversion [18,19], Floquet electromagnonics [20], and nonreciprocity [21] Future experiments could realize, for example, magnon-mediated cooling of the mechanics into the ground state, which would achieve the largest mechanical system to date to be taken into its quantum ground state, and possibly allow tests of gravitational decoherence currently being pursued with levitated spheres [45,46,47,48]
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