Cavity-mediated dissipative spin-spin coupling

作     者：Vahram L. Grigoryan Ke Xia 

作者机构：Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen 518055 China and Center for Quantum Computing Peng Cheng Laboratory Shenzhen 518005 China 

出 版 物：《Physical Review B》 (凝聚态物质与材料物理学)

年 卷 期：2019年第100卷第1期

页      面：014415-014415页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China, NSFC, (11734004, 21421003, 61774017) National Natural Science Foundation of China, NSFC National Basic Research Program of China (973 Program), (2017YFA0303300) National Basic Research Program of China (973 Program) 

主　　题：Ferrimagnetism Magnons Coupled oscillators Ferromagnets Landau-Lifschitz-Gilbert equation 

摘      要：We study dissipative spin-spin coupling in a dispersive regime mediated by virtual photons in a microwave cavity. Dissipative coupling between spin of each magnetic material and the cavity photons is established by means of two phase-shifted driving forces acting on each spin. We show that mode-level attraction between two spin modes can be reached when one of the spins is dissipatively coupled to the cavity. By tuning the phase parameter at each ferromagnetic insulator, we can shift the order of “dark and “bright collective modes with the phase difference equal to 0 or π. Moreover, by selectively applying the phase-shifted field, it is possible to construct dark and bright collective modes with the phase difference equal to ±π/2.