Inflationary Tensor Perturbation in Eddington-inspired Born-Infeld gravity

Understand

We investigate the tensor perturbation in the inflation model driven by a massive-scalar field in Eddington-inspired Born-Infeld gravity.

• For short wave-length modes, the perturbation feature is very similar to that of the usual chaotic inflation.
• For long wave-length modes, the perturbation exhibits a peculiar rise in the power spectrum which may leave a signature in the cosmic microwave background radiation.