耗散耦合腔磁系统中极化子的量子特性  

Quantum properties of cavity-magnon polarons in cavity-magnonics with dissipative coupling

作　　者：李欣悦 欧孝飞 董婷婷 佟雨潞 朱爱东 LI Xinyue;OU Xiaofei;DONG Tingting;TONG Yulu;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）》2023年第1期43-47,共5页Journal of Yanbian University（Natural Science Edition）

基　　金：国家自然科学基金(12264051)。

摘　　要：利用非厄米腔磁学系统研究了相干耦合和耗散耦合对极化子量子性质的影响,并采用主方程数值模拟的方法研究了哈密顿本征能谱的特点.结果表明:在耗散耦合的作用下,本征能谱显示出不同于相干耦合的现象,即实部表现出能级吸引,虚部发生能级排斥.当系统中同时存在相干耦合和耗散耦合时,相干耦合对极化子的演化起主导作用,而耗散耦合仍会影响本征能谱的分布,并且不同相位下的本征能谱分布呈周期性变化.该研究结果可为腔磁学系统的量子信息处理提供理论参考.The effects of coherent coupling and dissipative coupling on the quantum properties of cavity-magnon polarons were studied by using a non-Hermitian cavity-magnonic system,and the characteristics of eigenenergy spectrum of Hamiltonian were studied by using numerical simulations of master equation.The results show that the eigenenergy spectrum exhibits different properties from the coherent coupling under dissipative coupling,i.e.,the real part of the eigenenergy spectrum shows energy level attraction,while the imaginary part shows level repulsion.When the coherent coupling and dissipative coupling exist simultaneously,the former plays a dominant role during the polaron evolution,but dissipative coupling can also effect on distribution of eigenenergy,and the distribution of eigenenergy spectrum with different phases exhibit periodical changes.The research results of this work have theoretical reference to quantum information processing with cavitymagnonic system.

关 键 词：相干耦合 耗散耦合 腔磁极化子 钇铁石榴石 

分 类 号：O431.2[机械工程—光学工程]