论文标题
兰道在平均侵入理论中引力的抑制
Landau damping for gravitational waves in parity-violating theories
论文作者
论文摘要
我们讨论当奇偶校验对称性被明确破坏时，在存在速度双折射的情况下，引力波的张量如何遭受Landau阻尼。特别是，我们分析了Nieh-Yan和Chern-Simons术语在修改的重力理论中的作用，显示了无碰撞介质中的重力扰动如何以跨膜相位速度的特征，从而绕过了众所周知的一般相对性结果并允许Kinematic抑制的外观。我们详细研究了培养基的热力学特性之间的联系，例如温度和与重力波相互作用的颗粒的质量，以及统治模型术语的均衡项的参数。在这方面，我们概述了分散关系如何在每个模型中引起波数空间的不同区域，在这些区域中，相位速度是肾小球，超亮性或不存在的。对考虑模型的定量估计值表明，鉴于当今仪器的敏感性，无法检测到Landau阻尼的现象。
We discuss how tensor polarizations of gravitational waves can suffer Landau damping in the presence of velocity birefringence, when parity symmetry is explicitly broken. In particular, we analyze the role of the Nieh-Yan and Chern-Simons terms in modified theories of gravity, showing how the gravitational perturbation in collisionless media can be characterized by a subluminal phase velocity, circumventing the well-known results of General Relativity and allowing for the appearance of the kinematic damping. We investigate in detail the connection between the thermodynamic properties of the medium, such as temperature and mass of the particles interacting with the gravitational wave, and the parameters ruling the parity violating terms of the models. In this respect, we outline how the dispersion relations can give rise in each model to different regions of the wavenumber space, where the phase velocity is subluminal, superluminal or does not exist. Quantitative estimates on the considered models indicate that the phenomenon of Landau damping is not detectable given the sensitivity of present-day instruments.
