TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysProc.4.012
TI  - Linear stability of Einstein and de Sitter universes in the quadratic theory of modified gravity
PY  - 2021/08/13
UR  - https://scipost.org/SciPostPhysProc.4.012
JF  - SciPost Physics Proceedings
JA  - SciPost Phys. Proc.
VL  - 
IS  - 4
SP  - 012
A1  - Al-Ajmi, Mudhahir
AB  - We consider the Einstein static and the de Sitter universe solutions and examine their instabilities in a subclass of quadratic modified theories for gravity. This modification proposed by Nash is an attempt to generalize general relativity. Interestingly, we discover that the Einstein static universe is unstable in the context of the modified gravity. In contrast to Einstein static universe, the de Sitter universe remains stable under metric perturbation up to the second order.
ER  -

@Article{10.21468/SciPostPhysProc.4.012,
	title={{Linear stability of Einstein and de Sitter universes in the quadratic theory of modified gravity}},
	author={Mudhahir Al-Ajmi},
	journal={SciPost Phys. Proc.},
	pages={012},
	year={2021},
	publisher={SciPost},
	doi={10.21468/SciPostPhysProc.4.012},
	url={https://scipost.org/10.21468/SciPostPhysProc.4.012},
}