Sanchar Sharma

TL;DR: This work model the cooling of a sphere made of a magnetic insulator, such as yttrium iron garnet, using a monochromatic laser source and predicts that such a cooling process can significantly reduce the temperature of the magnetic order within current technology.

TL;DR: In this paper, the authors theoretically study inelastic scattering of photons by a magnetic sphere that supports optical whispering gallery modes in a plane normal to the magnetization, and they show that the reflection spectrum contains either a Stokes or anti-Stokes peak, depending on the direction of the magnetisation, a selection rule that can be explained by the chirality of the Damon Eshbach magnons.

TL;DR: In this article, the magnetostatic modes active for Brillouin light scattering in the optical whispering gallery modes of a yttrium iron garnet sphere were identified by magnetic-field dispersion of ferromagnetic-resonance spectroscopy and coupling strength to the known field distribution of the microwave drive antenna.

TL;DR: In this article, the authors theoretically discuss an idea to increase optomagnonic coupling in optical whispering gallery mode cavities by generalizing a previous analysis to include the exchange interaction, and they predict that the coupling constant to surface magnons in yttrium iron garnet (YIG) spheres with radius 300μm can be up to 40 times larger than that to the macrospin Kittel mode.

TL;DR: In this article, the ground state of an ellipsoid shaped magnet was used to generate a cat state, i.e., a quantum superposition of two distinct magnetization directions, using a conventional setup of a macroscopic ferromagnet in a microwave cavity.