Chi tiết về thư mục
| Tiêu đề: |
Normal mode analysis within a mutilated relaxation time approximation. |
| Nhiều tác giả: |
Hu, Jin1 (AUTHOR) hu-j23@fzu.edu.cn |
| Nguồn: |
European Physical Journal C -- Particles & Fields. Mar2025, Vol. 85 Issue 3, p1-13. 13p. |
| Điều khoản chủ đề: |
*BOLTZMANN'S equation, *LINEAR statistical models, *CLASSIFICATION |
| Bài tóm tắt: |
In this paper, we present a detailed analysis of normal modes based on the Boltzmann equation within the mutilated relaxation time approximation (RTA). Using this linearized effective kinetic description, our analysis encompasses a complete order calculation in wavenumber k, extending the conventional hydrodynamic mode analysis to intermediate and short-wavelength regions. Furthermore, our linear mode analysis can provide a natural classification of kinetic modes into collective modes and non-collective single-particle excitations. In the case of an energy-independent relaxation time, the behavior of hydrodynamic onset transitions is recovered (Romatschke in Eur Phys J C 76:352, 2016). However, for the case with an energy-dependent relaxation time, the distinct classification becomes less clear, as the location of hydrodynamic modes is not well separated from non-hydrodynamic modes. [ABSTRACT FROM AUTHOR] |
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