The quasiclassical approach to superfluid 3He
The quasiclassical approach to superfluid 3He
复制标题
超流体 3He 的准经典方法
DOI：
10.1016/0370-1573(83)90051-0
复制
发表时间：
1983
期刊：
影响因子：
--
通讯作者：
D. Rainer
中科院分区：
文献类型：
--
作者：
J. Serene;D. Rainer
我们利用δ/EF、ϵ0−1/kF等小参数的系统展开，发展了正常流体和超流体的准经典理论，并特别注意了外部扰动和可观测值的高能重整化。我们将一般形式应用于许多更具体的问题，包括normal3He的非线性量子动力学方程的推导，超流体3he的弱耦合和强耦合自由能和静态响应函数，以及超流体相的低频和高频动力学。我们还讨论了准经典框架的扩展，以涵盖强短程微扰，如壁和离子，回顾了最近的准粒子散射振幅的现象学模型，并给出了实时格林函数的Keldysh微扰理论的一个简短但独立的推导。
We develop the quasiclassical theory for normal and superfluid liquid3He using a systematic expansion in small parameters such as δ/EF, ϵ0−1/kF, etc., and paying particular attention to the high-energy renormalizations of the external pertubations and observables. We apply the general formalism to a number of more specific problems including the derivation of the non-linear quantum kinetic equation for normal3He, the weak-coupling and strong-coupling free energies and static response functions for superfluid3He, and the low-frequency and high-frequency dynamics of the superfluid phases. We also discuss extensions of the quasiclassical framework to cover strong short-ranged pertubations such as walls and ions, review recent phenomenological models for the quasiparticle scattering amplitude, and present a brief but self-contained derivation of the Keldysh perturbation theory for real-time Green's functions.