AI 中文总结
该研究提出一种描述超哈勃涨落反作用的周期相互作用暗 sector 宇宙学模型，用CMB等数据约束后，发现振荡相互作用振幅显著，但未优于ΛCDM模型。
AI 中文摘要
我们提出一种新的宇宙学模型，该模型可有效描述超哈勃涨落对宇宙学背景的反作用，这是所有宇宙学场景中预期会出现的通用效应，无需额外成分。从现象学层面，它可被诠释为一种暗 sector 相互作用场景，其中能量转移的符号随时间周期性变化。我们利用CMB、BAO及Ia型超新星数据对该模型进行约束。研究发现，数据允许振荡相互作用存在显著振幅，但与ΛCDM模型相比，该模型未获得统计上显著的偏好。
英文摘要
We introduce a novel cosmological model that provides an effective description of the back-reaction of super-Hubble fluctuations on the cosmological background, a generic effect expected to arise in any cosmological scenario without requiring additional ingredients. At the phenomenological level, it can be interpreted as an interacting dark sector scenario in which the sign of the energy transfer changes periodically over time. We constrain the model using CMB, BAO, and Type Ia supernova data. We find that a significant amplitude of the oscillatory interaction is allowed by the data, although there is no statistically significant preference for this model over $Λ$CDM.
Comments22 pages, 05 figures and 01 table
