Gauge-invariant metric fluctuations from NKK theory of gravity: de Sitter expansion

Abstract

In this paper we study gauge-invariant metric fluctuations from a Noncompact Kaluza-Klein (NKK) theory of gravity in a de Sitter expansion. We recover the well known result $\delta \rho /\rho \simeq 2\Phi$, obtained from the standard 4D semiclassical approach to inflation. The spectrum for these fluctuations should be dependent of the fifth (spatial-like) coordinate.

version accepted in Phys. Lett. B

References in corpus (10)

• An Alternative to Compactification
• The Hierarchy Problem and New Dimensions at a Millimeter
• New Dimensions at a Millimeter to a Fermi and Superstrings at a TeV
• Particle Physics Models of Inflation and the Cosmological Density Perturbation
• Kaluza-Klein Gravity
• Stochastic Inflation:The Quantum Phase Space Approach
• Extra Force in Brane Worlds
• Does The Force From an Extra Dimension Contradict Physics in 4D?
• de Sitter inflationary expansion from a noncompact KK theory: a nonperturbative quantum (scalar) field formalism
• Origin of FRW cosmology in slow-roll inflation from noncompact Kaluza-Klein theory

Cited by in corpus (10)

• Vacuum Waves
• Inflaton and metric fluctuations in the early universe from a 5D vacuum state
• Gravitational waves during inflation from a 5D large-scale repulsive gravity model
• Gravitational Waves generated during inflation from a 5D vacuum theory of gravity in a de Sitter expansion
• Cosmological expansion governed by a scalar field from a 5D vacuum
• Induced inflation from a 5D purely kinetic scalar field formalism on warped product spaces
• Scalar Metric fluctuations in space time matter inflation
• Waves and causality in higher dimensions
• Gauge invariant metric fluctuations in the early universe from STM theory of gravity: nonperturbative formalism
• Non-perturbative scalar gauge-invariant metric fluctuations from the Ponce de Leon metric in the STM theory of gravity