Consistency equations in Randall–Sundrum cosmology: a test for braneworld inflation

Consistency equations in Randall-Sundrum cosmology: a test for braneworld inflation

In the context of an inflationary Randall-Sundrum Type II braneworld (RS2) we calculate spectral indices and amplitudes of cosmological scalar and tensor perturbations, up to second order in slow-roll parameters. Under very simple assumptions, extrapolating next-order formulas from first-order calculations in the case of a de Sitter brane, we see that the degeneracy between standard and branewo...

Degeneracy of consistency equations in braneworld inflation

In a Randall–Sundrum type II inflationary scenario we compute perturbation amplitudes and spectral indices up to next-to-lowest order in the slowroll parameters, starting from the well-known lowest-order result for a de Sitter brane. Using two different prescriptions for the tensor amplitude, we show that the braneworld consistency equations are not degenerate with respect to the standard relat...

The consistency relation in braneworld inflation

Consistency relation in general braneworld inflation

1550-7998=20 We study gravitational perturbations in general braneworlds carrying a perturbation of the de Sitter universe. We derive our results from a full five-dimensional quantum field theory, and exhibit explicit formulas for the scalar and tensor power spectra. We show by explicit calculation that the dark radiation induced by our perturbation is zero, which implies that the deformation a...

Braneworld Cosmology: Sneutrino Inflation and Leptogenesis

Modifications to the Friedmann equation in brane cosmology can have important implications for early universe phenomena such as inflation and the generation of the baryon asymmetry. In the framework of braneworld cosmology, we discuss a mechanism for baryogenesis via leptogenesis in the supersymmetric context, where the sneutrino is responsible for both inflation and the generation of the baryo...