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Riemann-Eddington theory: Incorporating matter, degravitating the cosmological constant

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info:eu-repo/semantics/closedAccess

Date

2014

Author

Demir, Durmus Ali

Metadata

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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.

Source

Physical Review D

Volume

90

Issue

6

URI

https://doi.org/10.1103/PhysRevD.90.064017
https://hdl.handle.net/11147/10369

Collections

  • WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection [4803]



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