Dynamical Backaction Magnomechanics

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.

Magnomechanics in suspended magnetic beams

“…4 and 5 and depending on the precise magnetic field the actual magnomechanical coupling may be somewhat larger. It is comparable to what was found for the magnomechanical coupling in [19,22] for YIG spheres and somewhat smaller than the optomechanical coupling in our setups (e.g., g ∼ 100 Hz in [8]).…”

“…Recently, the coupling between magnons and phonons has been considered to obtain an interaction similar to that in cavity optomechanics, but with the role of photons now played by magnons [19][20][21][22]. The interaction between magnons and phonons is mediated by the combination of the magnetic shape anisotropy and the magnetoelastic effect which make the frequency of the magnon, i.e., the ferromagnetic resonance (FMR), dependent on the strain.…”

Quantum network with magnonic and mechanical nodes

“…Cavity magnonics has now become a new platform for the study of strong interactions between light and matter, in the context of cavity quantum electrodynamics (QED) with magnons. As one of the main advantages, the magnonic system shows an excellent ability to coherently interact with diverse quantum systems, including microwave [6][7][8] or optical photons [11][12][13], phonons [14,22,31,34], and superconducting qubits [9,15,28,32]. Hybrid cavity magnonic systems promise potential applications in quantum information processing [3], quantum sensing [35][36][37], and in searching dark matter axions [38], to name a few.…”