2021/03/31 by Wei-Jiang Wu, Yi‐Pu Wang, Yi-Pu Wang +4 · 1 citation
Engineering · Physics and Astronomy · #Advanced MEMS and NEMS Technologies #Astronomy #Condensed matter physics #Ferrimagnetism #Ferromagnetism #Magnetic field #Magnetization #Magnon #Mechanical and Optical Resonators #Photonic and Optical Devices #Physics #Quantum #Quantum entanglement #Quantum mechanics #SPHERES #cond-mat.mes-hall #physics.optics #quant-ph
paper · pdf · doi:10.1103/physreva.104.023711
published as Phys. Rev. A 104, 023711 (2021)
arxiv created 2021/08/17 · openalex publication_date 2021/08/27 · arxiv updated 2021/08/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Recent studies show that hybrid quantum systems based on magnonics provide a new and promising platform for generating macroscopic quantum states involving a large number of spins. Here, we show how to entangle two magnon modes in two massive yttrium-iron-garnet (YIG) spheres using cavity optomagnonics, where magnons couple to high-quality optical whispering gallery modes supported by the YIG sphere. The spheres can be as large as 1 mm in diameter and each sphere contains more than 1018 spins. The proposal is based on the asymmetry of the Stokes and anti-Stokes sidebands generated by the magnon-induced Brillouin light scattering in cavity optomagnonics. This allows one to utilize the Stokes and anti-Stokes scattering process, respectively, for generating and verifying the entanglement. Our work indicates that cavity optomagnonics could be a promising system for preparing macroscopic quantum states.