通过观测测试暗能量和改变牛顿常数探索额外维度
Exploring extra dimensions through observational tests of dark energy and varying Newton's constant
摘要：
我们最近提出了一系列的暗能量定理，这些定理限制了暗能量的状态方程（$\wdark$）、牛顿常数的时变（$\dot G$）以及额外维度理论中能量条件的违反。在本文中，我们将探讨如何当前和未来的测量$\wdark$和$\dot G$可以被用来放置严格的限制在大类的这些理论（包括一些最好的动机的例子）独立的额外维度的大小。作为一个例子，我们表明，模型与保形Ricci平坦的度量服从零能量条件（一个共同的ananastomic卡鲁扎-克莱因和字符串结构）是高度约束的电流ata，并可能完全排除未来的暗能量和脉冲星观测。
英文摘要：
We recently presented a series of dark energy theorems that place constraints on the equation of state of dark energy ($\wdark$), the ime-variation of Newton's constant ($\dot G$), and the violation of energy conditions in theories with extra dimensions. In this paper, we explore how current and future measurements of $\wdark$ and $\dot G$ can be used to place tight limits on large classes of these theories (including some of the most well-motivated examples) independent of the size of the extra dimensions. As an example, we show that models with conformally Ricci-flat metrics obeying the null energy condition (a common ansatz for Kaluza-Klein and string constructions) are highly constrained by current ata and may be ruled out entirely by future dark energy and pulsar observations.
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