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gr-qc2024
The Exterior Calculus of Quadratic Gravity
Metin Arık, Ahmet Baykal, Tekin Dereli +1
The metric tensor field equations for the general quadratic curvature gravity in four spacetime dimensions are derived by making use of the algebra of the exterior forms defined on…
gr-qc2024
A Generally Covariant Model of Spacetime as a 4-Brane in 4+1 Flat Dimensions
Mert Ergen, Metin Arık
We construct a simple toy model of a closed FLRW spacetime by starting from a flat five dimensional scalar field space. The action contains no curvature terms. A string-like potent…