论文标题
部分可观测时空混沌系统的无模型预测
Gravitational wave birefringence in spatially curved teleparallel cosmology
论文作者
论文摘要
我们研究了一类被称为新的一般相对论的触发性重力理论中最通用的宇宙学对称背景的张量扰动。这些理论包括一个参数类别，与牛顿后级别的观察完全一致，并且包含远程相对论作为特殊情况。我们发现，对于特定类别的宇宙学背景几何形状，这些理论表现出引力波双折射和分散体，即引力波的分散关系取决于它们的极化和波数。这种作用的强度与宇宙学背景的空间曲率和描述理论偏离一般相对性的偏差的参数直接相关。我们讨论了在重力波实验中观察这种效果的可能性。
We study tensor perturbations around the most general cosmologically symmetric backgrounds in a class of teleparallel gravity theories known as New General Relativity. These theories comprise a one-parameter class, which is fully consistent with observations at the post-Newtonian level, and which contains the teleparallel equivalent of General Relativity as a special case. We find that for a particular class of cosmological background geometries these theories exhibit gravitational wave birefringence and dispersion, i.e., the dispersion relation for gravitational waves depends on their polarization and wave number. The strength of this effect is directly related to the spatial curvature of the cosmological background and the parameter describing the deviation of the theory from General Relativity. We discuss the possibility of observing this effect in gravitational wave experiments.
