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首页> 外文期刊>Journal of physics, A. Mathematical and theoretical >On algebraic damping close to inhomogeneous Vlasov equilibria in multi-dimensional spaces
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On algebraic damping close to inhomogeneous Vlasov equilibria in multi-dimensional spaces

机译:关于多维空间中不均匀Vlasov平衡点的代数阻尼

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摘要

We investigate the asymptotic damping of a perturbation around inhomogeneous stable stationary states of the Vlasov equation in spatially multi-dimensional systems. We show that branch singularities of the Fourier-Laplace transform of the perturbation yield algebraic dampings, even for a smooth stationary state and perturbation. In two spatial dimensions, we classify the singularities and compute the associated damping rate and frequency. This 2D setting also applies to spherically symmetric self-gravitating systems. We validate the theory on an advection equation associated with the isochrone model, a model of spherical self-gravitating systems.
机译:我们研究在空间多维系统中Vlasov方程的非均匀稳定稳态周围扰动的渐近阻尼。我们表明,即使对于平稳的平稳状态和扰动,扰动的傅立叶-拉普拉斯变换的分支奇点也会产生代数阻尼。在两个空间维度上,我们对奇点进行分类并计算相关的阻尼率和频率。此2D设置也适用于球对称自重系统。我们验证了与等时线模型(球形自重系统模型)相关的对流方程的理论。

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