Non-Canonical Inflation and Primordial Black Holes Production

Understand

We study a mechanism for the amplification of the inflationary scalar perturbation when the inflaton field action is non-canonical, i.e.

• the inflaton kinetic term has a non-standard form.
• For such a case the speed of sound of the perturbations generated during inflation is less than one and in general changes with time.
• Furthermore in such models, even when the scalar field potential is negligible, diverse inflationary attractors may exist.