Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/10601
Title: Riemann-Eddington theory: Incorporating matter, degravitating the cosmological constant
Authors: Demir, Durmuş Ali
Issue Date: 2014
Publisher: American Physical Society
Abstract: Here we show that Eddington's pure affine gravity, when extended with Riemann curvature, leads to gravitational field equations that incorporate matter. This Riemanned Eddington gravity outfits a setup in which matter gravitates normally with Newton's constant but vacuum gravitates differently with an independent gravitational constant. This novel setup enables degravitation of the vacuum to observed level not by any fine-tuning but by a large hierarchy between its gravitational constant and its energy density. Remarkably, degravitation of the cosmological constant is local, causal and natural yet only empirical because the requisite degravitation condition is not predicted by the theory.
URI: https://doi.org/10.1103/PhysRevD.90.064017
https://hdl.handle.net/10601
ISSN: 2470-0010
2470-0029
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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