耦合腔磁系统中磁子的压缩  

Squeezing of magnons in a coupled cavity-magnonic system

作　　者：王根艳 李世龑 朱爱东 WANG Genyan;LI Shiyan;ZHU Aidong(College of Science,Yanbian University,Yanji 133002,China)

机构地区：[1]延边大学理学院,吉林延吉133002

出　　处：《延边大学学报（自然科学版）》2021年第4期303-308,339,共7页Journal of Yanbian University（Natural Science Edition）

基　　金：国家自然科学基金(11564041)。

摘　　要：提出了一个在耦合腔磁系统中制备磁子压缩态的方案.该系统由两个内部分别嵌入钇铁石榴石球的微波腔通过超导传输线相互耦合组成,磁子与微波腔之间存在磁偶极相互作用.利用弱压缩真空场驱动其中一个微波腔能够产生磁子压缩态.数值计算结果表明,相比于克尔非线性机制的方案,该方案产生的磁子压缩度更高.该方案可为研究多个磁子的压缩提供参考.We propose a scheme to prepare magnon squeezed states in a coupled cavity magnonic system.The system consists of two microwave cavities embedded with two macroscopic yttrium iron garnet spheres,respectively,coupled with each other through a superconducting transmission line.The magnon interacts with the cavity via the magnetic dipole interaction.By using a weak squeezed vacuum field to drive one of the cavities,the magnon squeezed state can be produced.The numerical results show that compared with scheme with Kerr nonlinearity,the current scheme has a higher squeezing degree.This scheme can provide references for the study of squeezing for multiple magnons.

关 键 词：腔磁系统 磁子压缩态 压缩真空场 压缩度 

分 类 号：O413.2[理学—理论物理]