Multi-scalar tachyon potential on non-BPS domain walls

TL;DR

This paper derives an effective multi-scalar tachyon potential on a 3D domain wall in 5D spacetime, exploring its implications for assisted inflation and tachyon condensation.

Contribution

It introduces a method to obtain the effective action for multi-tachyon fields on a domain wall from 5D supergravity, linking to inflation models.

Findings

Derived multi-scalar tachyon potential suitable for inflation modeling

Analyzed tachyon condensation processes

Connected domain wall dynamics with cosmological scenarios

Abstract

We have considered the multi-scalar and multi-tachyon fields living on a 3d domain wall embedded in a 5d dimensional Minkowski spacetime. The effective action for such a domain wall can be found by integrating out the normal modes as vibrating modes around the domain wall solution of a truncated 5d supergravity action. The multi-scalar tachyon potential are good enough to modeling assisted inflation scenario with multi-tachyon fields. The tachyon condensation are also briefly addressed.