arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2603.04841astro-ph.COgr-qchep-th
收藏

探测暗能量月球

Probing Dark Energy on the Moon

Vanderbilt University(范德堡大学)

Alfredo Gurrola, Robert J. Scherrer, Oem Trivedi

AI总结:

利用月球激光干涉仪探测暗能量EFT的动能部分,以约束其微物理参数和声速。

摘要:

有效场论(EFT)为宇宙加速提供了模型无关的框架,用于描述暗能量和修改引力,但许多定义算子仍受到现有观测的弱约束。我们展示,通过月球激光干涉仪测量视界尺度的度规波动,可以直接探测暗能量EFT的动能部分,从而对支配标量扰动动力学的算子进行约束,而不仅仅是背景膨胀历史。特别是,我们展示了对暗能量EFT动能系数$M_2^4$和相关的暗能量声速$c_s^2$的灵敏度。这为晚期加速模型的微物理一致性条件提供了定性新的观测手段,允许广泛区域的EFT参数空间被探测、约束或潜在发现。

英文摘要:

The effective field theory (EFT) of cosmic acceleration provides a model-independent framework for describing dark energy and modified gravity, yet many of its defining operators remain weakly constrained by existing observations. We show that measurements of horizon-scale metric fluctuations with a lunar laser interferometer can directly probe the kinetic sector of the EFT of dark energy, enabling constraints on operators governing scalar perturbation dynamics rather than only the background expansion history. In particular, we demonstrate sensitivity to the EFT kinetic coefficient $M_2^4$ and the associated sound speed of dark energy, $c_s^2$. This establishes a qualitatively new observational handle on the microphysical consistency conditions of late-time acceleration models, allowing broad regions of EFT parameter space to be probed, constrained, or potentially discovered.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑