Inflation conditions for non-BPS D-branes

TL;DR

This paper studies the effective dynamics of non-BPS D-branes with time-dependent embeddings, focusing on tachyon and gravity coupling, and derives slow roll parameters relevant for cosmological models.

Contribution

It introduces a coupled tachyon-gravity effective action for non-BPS D-branes with time-dependent embeddings and derives slow roll parameters from this framework.

Findings

Derived slow roll parameters for the model.

Analyzed the coupling of tachyon and embedding to gravity.

Provided insights into inflation conditions for non-BPS D-branes.

Abstract

We investigate the effective action for a non-BPS brane in a time-depending embedding. This action is considered as the action for tachyon and embedding coupled to the brane gravity. We derive the slow roll parameters from this model.