激光对磁振子压缩态的作用

基金项目:

国家自然科学基金资助课题(10074004)

详细信息

Effect of Laser on Squeezed States of Magnon

Applied Science School, University of Science and Technology Beijing, Beijing 100083, China

摘要: 压缩态的量子起伏低于相干态相应的量子起伏.同声子和光子比较,自旋波的元激发——磁振子,也属于玻色子;在粒子数表像中,磁振子的哈密顿量在形式上与光子和声子的哈密顿量相似,因而磁振子的压缩态是可能存在的.通过测量在激光场下自旋分量的量子涨落,可以获得材料的性能参数.
- 压缩态 /
- 相干态 /
- 磁振子 /
- 自旋波
Abstract: A squeezed state of phonons and photons may have less quantum fluctuation than a coherent state. Compared to phonons or photons, the elementary excitations of the spin waves-magnons, are also bosons. Their Hamiltonian in a particle-number representation is similar to that of phonons or photons, and thus the squeezed state of magnons is possible to exist. The parameters characterizing the properties of materials can be calculated by measuring the quantum fluctuation of spin components in the laser field.
- squeezed state /
- coherent state /
- magnon /
- spin wave