Warm tachyonic inflation in warped background

Understand

We analyze warm tachyonic inflation, proposed in the literature, but from the viewpoint of four dimensional effective action for tachyon field on a non-BPS D3-brane.

• We find that consistency with observational data on density perturbation and validity of effective action requires warped compactification.
• The number of background branes which source the flux is found to be of the order of 10 in contrast to the order of $10^{14}$ in the standard cold inflationary scenario.