Remote magnon entanglement between two massive ferrimagnetic spheres via cavity optomagnonics

• URL: http://arxiv.org/abs/2103.10595v2
• Date: Tue, 17 Aug 2021 01:25:11 GMT
• Title: Remote magnon entanglement between two massive ferrimagnetic spheres via cavity optomagnonics
• Authors: Wei-Jiang Wu, Yi-Pu Wang, Jin-Ze Wu, Jie Li, J. Q. You
• Abstract summary: We show how to entangle two magnon modes in two massive yttrium-iron-garnet spheres using cavity optomagnonics. Our work indicates that cavity optomagnonics could be a promising system for preparing macroscopic quantum states.
• Score: 8.443985914977684
• License: http://creativecommons.org/publicdomain/zero/1.0/
• Abstract: 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 $10^{18}$ 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.

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