Degravitation and the relaxed Einstein equations

Abstract

The general idea to modify Einstein's field equations by promoting Newton's constant $G$ to a covariant differential operator $G_{\Lambda }({\square }_g)$ was apparently outlined for the first time in [12-15]. The modification itself originates from the quest of finding a mechanism which is able to degravitate the vacuum energy on cosmological scales. We present in this article a precise covariant coupling model which acts like a high-pass filter with a macroscopic distance filter scale $\sqrt{\Lambda }$. In the context of this particular theory of gravity we work out the effective relaxed Einstein equations as well as the effective 1.5 post-Newtonian total near-zone mass of a many body system. We observe that at any step of computation we recover in the limit of vanishing modification parameters the corresponding general relativistic result.

arXiv comment23 pages, 1 figure

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