State tomography for magnetization dynamics
State tomography for magnetization dynamics
复制标题
磁化动力学状态断层扫描
DOI：
10.1103/physrevb.104.l100419
复制
发表时间：
2021
影响因子：
3.7
通讯作者：
Saitoh Eiji
中科院分区：
文献类型：
--
作者：
Hioki Tomosato;Shimizu Hiroki;Makiuchi Takahiko;Saitoh Eiji
状态断层扫描是分析量子科学中物理状态的重要工具。在磁体中，称为磁振子或自旋波的基本激发主导着磁化动力学和各种磁特性。在这里，我们提出并演示了磁化动力学的状态断层扫描，使我们能够获得磁化动力学的密度矩阵和维格纳函数。使用该技术，我们发现参量激发磁振子可以形成由两个相干态组成的混合态。磁化态断层扫描将为探索磁振子的各种状态铺平道路，例如凝聚态物质中的压缩状态。
State tomography is an essential tool for analyzing physical states in quantum science. In magnets, elementary excitation called a magnon, or a spin wave, dominates magnetization dynamics and various magnetic properties. Here, we propose and demonstrate state tomography for magnetization dynamics, enabling us to obtain a density matrix and Wigner function of the magnetization dynamics. Using the technique, we found that parametrically excited magnons can form a mixed state composed of two coherent states. Magnetization state tomography will pave a way to explore a wide range of states of magnons, such as a squeezed state in condensed matter.