By introducing the general construction of Landau functional of the van der Waals system and charged AdS black hole system, we have preliminarily realized the Landau continuous phase transition theory in black hole thermodynamics. The results show that the Landau functional constructed in present paper can directly reflect the physical process of black hole phase transition. Specifically, the splitting of the global minimum of the Landau functional corresponds to the second-order phase transition of the black hole, and the transformation of the global minimum reflects the first-order phase transition of the black hole.

中文翻译：

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朗道理论中的范德华流体和带电 AdS 黑洞

通过介绍范德华系统和带电AdS黑洞系统的Landau泛函的一般构造，初步实现了黑洞热力学中的Landau连续相变理论。结果表明，本文构建的朗道泛函可以直接反映黑洞相变的物理过程。具体地，Landau泛函全局极小值的分裂对应于黑洞的二阶相变，全局极小值的变换反映了黑洞的一阶相变。