Toward pole inflation and attractors in supergravity : Chiral matter field inflation

Understand

In string-inspired supergravity theory, K\"{a}hler metric of chiral matter fields often has a pole.

• Such K\"{a}hler metric is interesting from the viewpoint of the framework of the pole inflation, where the scalar potential can be stretched out to be flat around the pole for a canonically normalized field and inflation can be realized.
• However, when K\"{a}hler metric has a pole, the scalar potential can also have a pole at the same point in supergravity theory.
• We study such supergravity models with the pole, and provide numerical analysis of inflationary dynamics and resultant density perturbation.