论文标题
自旋通道波的传播
Propagation of spin channel waves
论文作者
论文摘要
构建了一个肢解模型，以近似旋转玻尔兹曼方程的碰撞项，该方程融合了新出现的碰撞不变式，即总角动量。通过诉诸退化的扰动理论，制定了流体动力模式的分散关系，其中旋转模式是旋转平衡的原因。我们发现非局部性不会改变音速，而会减慢自旋通道波的传播。自旋模式的阻尼速率接近于在合理的参数值范围内的无旋模模式。结果表明，旋转和动量都应在统一的运输框架中同时处理。在非依次主义极限中，还探讨了正常模式的短波长行为，并且对于仅量词模式贡献的每个独特的离散模式的关键点都有一个关键点。
A mutilated model is constructed to approximate the collision term of spin Boltzmann equation that incorporates newly appearing collisional invariants i.e, the total angular momentum. With recourse to degenerate perturbation theory, the dispersion relations of hydrodynamic modes are formulated, among which spin modes are responsible for spin equilibration. We find that the non-locality does not change the sound speed but slows down the propagation of spin channel waves. The damping rates of spin modes are close to those of spinless modes over a reasonable parameter value range. The results reveal that both spin and momentum should be treated simultaneously in a unified transport framework. In the nonrelativistic limit, the short-wavelength behavior for normal modes is also explored and there exists a critical point for every distinct discrete mode over which only quasiparticle modes contribute.
