*Article* **Dynamic and Renormalization-Group Extensions of the Landau Theory of Critical Phenomena**

**Miroslav Grmela 1,\*, Václav Klika <sup>2</sup> and Michal Pavelka <sup>3</sup>**


Received: 14 August 2020; Accepted: 31 August 2020; Published: 2 September 2020

**Abstract:** We place the Landau theory of critical phenomena into the larger context of multiscale thermodynamics. The thermodynamic potentials, with which the Landau theory begins, arise as Lyapunov like functions in the investigation of the relations among different levels of description. By seeing the renormalization-group approach to critical phenomena as inseparability of levels in the critical point, we can adopt the renormalization-group viewpoint into the Landau theory and by doing it bring its predictions closer to results of experimental observations.

**Keywords:** entropy; critical phenomena; renormalization; multiscale thermodynamics; GENERIC
