We establish the possibility of Landau damping for gravitational scalar waves which propagate in a non-collisional gas of particles. In particular, under the hypothesis of homogeneity and isotropy, we describe the medium at the equilibrium with a Jüttner–Maxwell distribution, and we analytically determine the damping rate from the Vlasov equation. We find that damping occurs only if the phase velocity of the wave is subluminal throughout the propagation within the medium. Finally, we investigate relativistic media in cosmological settings by adopting numerical techniques.

中文翻译：

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用于大规模标量模式的引力Landau阻尼

我们为在非碰撞粒子气体中传播的引力标量波确定了Landau阻尼的可能性。特别是，在均质和各向同性的假设下，我们用Jüttner-Maxwell分布描述了处于平衡状态的介质，并根据Vlasov方程解析地确定了阻尼率。我们发现，仅当波的相速度在介质内的整个传播过程中都处于腔以下时才发生阻尼。最后，我们采用数值技术研究宇宙论环境中的相对论媒体。