2019/03/31 by Jie Li, Shi-Yao Zhu, Shi‐Yao Zhu · 2 citations
Computer Science · Physics and Astronomy · #Condensed matter physics #Coupling (piping) #Electron #Ferromagnetism #Magnon #Magnonics #Mechanical and Optical Resonators #Physics #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum entanglement #Quantum mechanics #Spins #cond-mat.mes-hall #physics.optics #quant-ph
paper · pdf · doi:10.1088/1367-2630/ab3508
published as New J. Phys. 21, 085001 (2019) · To appear in New J. Phys., Special Issue on "Cavity Optomagnonics", edited by Hong Tang, Koji Usami, and Silvia Viola-Kusminskiy
arxiv created 2019/07/23 · openalex publication_date 2019/07/25 · arxiv updated 2022/03/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present a scheme to entangle two magnon modes in a cavity magnomechanical system. The two magnon modes are embodied by collective motions of a large number of spins in two macroscopic ferrimagnets, and couple to a single microwave cavity mode via magnetic dipole interaction. We show that by activating the nonlinear magnetostrictive interaction in one ferrimagnet, realized by driving the magnon mode with a strong red-detuned microwave field, the two magnon modes can be prepared in an entangled state. The entanglement is achieved by exploiting the nonlinear magnon-phonon coupling and the linear magnon-cavity coupling, and is in the steady state and robust against temperature. The entangled magnon modes in two massive ferrimagnets represent genuinely macroscopic quantum states, and may find applications in the study of macroscopic quantum mechanics and quantum information processing based on magnonics.