论文标题
角动量和伪角动量之间的差异
Difference between angular momentum and pseudoangular momentum
论文作者
论文摘要
在冷凝物质系统中，有必要区分系统成分的动量和准粒子的假膜。相同的区别对于角动量和伪角动量也有效。基于Noether定理，我们证明了最近讨论的声子和镁质的轨道角动量是假臂臂。这种概念上的差异对于正确理解凝结物质系统中角动量的转移至关重要，尤其是在Spintronics应用中。
In condensed matter systems it is necessary to distinguish between the momentum of the constituents of the system and the pseudomomentum of quasiparticles. The same distinction is also valid for angular momentum and pseudoangular momentum. Based on Noether's theorem, we demonstrate that the recently discussed orbital angular momenta of phonons and magnons are pseudoangular momenta. This conceptual difference is important for a proper understanding of the transfer of angular momentum in condensed matter systems, especially in spintronics applications.
