AI 中文总结
探讨动态暗能量在ZKDR近似下对光传播的影响，通过参数α(z)呈现两种等效解释导致简并，进而提出基于暗能量各向同性的简单统计检验，用于打破简并并检验暗能量动态性质。
AI 中文摘要
讨论了动态（幽灵）暗能量在泽尔多维奇 - 坎托夫斯基 - 戴尔 - 罗德（ZKDR）近似框架内对光传播的影响。该效应通过ZKDR模型中与红移相关的参数α(z)来考虑，α(z)定义为平均物质密度（重子物质、暗物质和宇宙学常数形式的暗能量）与总密度（包括其涨落）之比。我们证明，在（1）动态暗能量模型和（2）考虑具有宇宙学常数的宇宙中弱引力透镜的模型框架内，α(z)的观测表现有两种等效解释。因此，这两种物理情景之间出现了简并性。最后，提出了一种独立于宇宙学探测器的简单统计检验来打破这种简并性并检验暗能量的动态性质。该检验基于动态暗能量在固定红移处的预期各向同性，与弱引力透镜引起的物质分布中的随机不均匀性形成对比。
英文摘要
The influence of dynamical (phantom) dark energy on light propagation within the framework of the Zeldovich-Kantowsky-Dyer-Roeder (ZKDR) approximation is discussed. This effect is considered in terms of the redshift-dependent parameter $α(z)$ of the ZKDR model, which is defined as the ratio of the mean matter density (baryonic matter, dark matter, and dark energy in the form of a cosmological constant) to the total density, including its fluctuations. We demonstrate that the observational manifestations of $α(z)$ admit two equivalent interpretations in the framework of both (1) a dynamical dark energy model, and (2) a model considering weak gravitational lensing in a universe with a cosmological constant. Thus, a degeneracy arises between these two physical scenarios. Finally, a simple statistical test, independent of cosmological probes, is proposed for breaking this degeneracy and testing the dynamical nature of dark energy. The test is based on the expected isotropy of dynamical dark energy at a fixed redshift, in contrast to stochastic inhomogeneities in the matter distribution induced by weak gravitational lensing.
Comments13 pages, 4 figures
