The theory of L. D. Landau is used to conduct a hydrodynamic and thermodynamic examination of a number of issues related to the phase transition of He II to He I in the presence of macroscopic motion. In particular, it is shown that the transition in rotating helium is a first-order transition.

中文翻译：

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宏观运动下He II向He I的相变

LD Landau 理论用于对与存在宏观运动的 He II 到 He I 的相变相关的许多问题进行流体动力学和热力学检查。特别是，它表明旋转氦中的跃迁是一阶跃迁。