Accelerating Universe with a stable extra dimension in cuscuton gravity

Abstract

We study Kaluza-Klein cosmology in cuscuton gravity and find an exact solution describing an accelerating 4-dimensional universe with a stable extra dimension. A cuscuton which is a non-dynamical scalar field is responsible for the accelerating expansion and a vector field makes the extra dimensional space stable. Remarkably, the accelerating universe in our model is not exactly de Sitter.

arXiv comment10 pages

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Cited by in corpus (14)

• First-order thermodynamics of Horndeski gravity
• Cuscuton gravity as a classically stable limiting curvature theory
• Extended Cuscuton as Dark Energy
• Impact of compactlike and asymmetric configurations of thick branes on the scalar-tensor representation of $f\left(R,T\right)$ gravity
• Symmetric Scalars
• K-field kinks in two-dimensional dilaton gravity
• Spatially covariant gravity with two degrees of freedom: perturbative analysis
• Cuscuton Inflation
• Peculiar thermal states in the first-order thermodynamics of gravity
• Internal structure of cuscuton Bloch brane
• Models of modified $F(R,T)$ and cuscuton braneworld
• Theories with limited extrinsic curvature and a nonsingular anisotropic universe
• Generalized McVittie geometry in Horndeski gravity with matter
• Observational Constraints and Preheating in Cuscuton Inflation