Spin cat states in ferromagnetic insulators

Generating non-classical states in macroscopic systems is a long standing challenge. A promising platform the context of this quest are novel hybrid based on magnetic dielectrics, where photons can couple strongly and coherently to excitations, although state therein yet be observed. We propose scheme generate magnetization cat state, i.e. quantum superposition two distinct directions, using conventional setup ferromagnet microwave cavity. Our uses ground an ellipsoid shaped magnet, which displays anisotropic fluctuations akin squeezed vacuum. The collapses by either single-photon or parity measurement cavity state. find that with components separated $\sim5\hbar$ feasible briefly discuss potential experimental setups achieve it.