Scale-invariant tensor spectrum from conformal gravity

Abstract

We study cosmological tensor perturbations generated during de Sitter inflation in the conformal gravity with mass parameter $m^2=2H^2$. It turns out that tensor power spectrum is scale-invariant.

1+9 pages, no figure, version to appear in Mod. Phys. Lett. A

References in corpus (5)

• Einstein Gravity from Conformal Gravity
• Can a vector field be responsible for the curvature perturbation in the Universe?
• Gravitational- and Self- Coupling of Partially Massless Spin 2
• Inflation with a Weyl term, or ghosts at work
• Primordial massive gravitational waves from Einstein-Chern-Simons-Weyl gravity

Cited by in corpus (10)

• Quadratic Gravity
• Metastability in Quadratic Gravity
• Inflationary Perturbations in No-Scale Theories
• Cosmology with a light ghost
• Starobinsky inflation with a quadratic Weyl tensor
• Precision predictions of Starobinsky inflation with self-consistent Weyl-squared corrections
• Scale-invariant power spectra from a Weyl-invariant scalar-tensor theory
• Scale-invariant scalar spectrum from the nonminimal derivative coupling with fourth-order term
• Primordial Gravitational Waves in Quadratic Gravity
• Einstein-singleton theory and its power spectra in de Sitter inflation